HEMAGEN DIAGNOSTICS INC
SC 13D, 1999-10-12
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                  SCHEDULE 13D
                                 (Rule 13d-101)

    INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a)
             AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)

                               (Amendment No. __)


                            Hemagen Diagnostics, Inc.
- --------------------------------------------------------------------------------

                                (Name of Issuer)



                                  Common Stock
- --------------------------------------------------------------------------------

                         (Title of Class of Securities)


                                   423501 105
- --------------------------------------------------------------------------------

                                 (CUSIP Number)


                              Gary P. Kreider, Esq.
                           Keating, Muething & Klekamp
                       One East Fourth Street, 18th Floor
                             Cincinnati, Ohio 45202
                                 (513) 579-6411
- --------------------------------------------------------------------------------

                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                               September 30, 1999
- --------------------------------------------------------------------------------

             (Date of Event Which Requires Filing of this Statement)


     If the filing  person has  previously  filed a statement on Schedule 13G to
report the  acquisition  that is the subject of this Schedule 13D, and is filing
this  schedule  because  of Rule  13d-1(e),  13d-1(f)  or  13d-1(g),  check  the
following box [  ]


                       (Continued on the following pages)




<PAGE>


 CUSIP No. 423501 105                      13D      Page 2 of 18 Pages


- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Jerry L. Ruyan
- --------------------------------------------------------------------------------

 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a)  [X]
                                                               (b)  [ ]

- --------------------------------------------------------------------------------

 3        SEC USE ONLY

- --------------------------------------------------------------------------------


 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------

 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)           [ ]

- --------------------------------------------------------------------------------

 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States

- --------------------------------------------------------------------------------


                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      2,787,842 - See Item 5(I)(b)
         REPORTING
        PERSON WITH          9      SOLE DISPOSITIVE POWER

                                    468,478 - See Item 5(I)(b)

                             10      SHARED DISPOSITIVE POWER

                                     926,007
- --------------------------------------------------------------------------------

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          2,787,842 - See Item 5(I)(a)
- --------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                   [ ]

- --------------------------------------------------------------------------------

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                   29.14%
- --------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON*
             IN

- --------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP No. 423501 105                       13D      Page 3 of 18 Pages


- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

           William P. Hales

- --------------------------------------------------------------------------------

 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) [x]
                                                               (b) [ ]

- --------------------------------------------------------------------------------

 3        SEC USE ONLY

- --------------------------------------------------------------------------------

 4        SOURCE OF FUNDS*

             PF

- --------------------------------------------------------------------------------

 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                             [ ]


- --------------------------------------------------------------------------------

 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States

- --------------------------------------------------------------------------------

                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      2,787,842 - See Item 5(II)(b)
         REPORTING
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     1,233,357 - See Item 5(II)(b)

                             10      SHARED DISPOSITIVE POWER

                                     -0-
- --------------------------------------------------------------------------------

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          2,787,842 - See Item 5(II)(a)
- --------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*


- --------------------------------------------------------------------------------
13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          29.14%
- --------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON*
             IN
- --------------------------------------------------------------------------------

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




 CUSIP No. 423501 105                       13D      Page 4 of 18 Pages


- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Thomas A. Donelan

- --------------------------------------------------------------------------------

 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) [x]
                                                               (b) [ ]
- --------------------------------------------------------------------------------

 3        SEC USE ONLY

- --------------------------------------------------------------------------------

 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------

 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                              [ ]

- --------------------------------------------------------------------------------

 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States

- --------------------------------------------------------------------------------

                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      2,787,842 - See Item 5(III)(b)
         REPORTING
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     80,000

                             10      SHARED DISPOSITIVE POWER

                                     926,007 - See Item 5(III)(b)
- --------------------------------------------------------------------------------

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          2,787,842 - See Item 5(III)(a)
- --------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                  [ ]

- --------------------------------------------------------------------------------

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          29.14%

- --------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON*
             IN

- --------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>





 CUSIP No. 423501 105                       13D      Page  5 of 18 Pages

- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Christopher P. Hendy

- --------------------------------------------------------------------------------
 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) [x]
                                                               (b) [ ]

- --------------------------------------------------------------------------------

 3        SEC USE ONLY

- --------------------------------------------------------------------------------

 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------

 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                              [ ]

- --------------------------------------------------------------------------------

 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             United States

- --------------------------------------------------------------------------------

                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      2,787,842 - See Item 5(IV)(b)
         REPORTING
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     80,000

                             10      SHARED DISPOSITIVE POWER

                                     926,007 - See Item 5(IV)(b)
- --------------------------------------------------------------------------------

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          2,787,842 - See Item 5(IV)(a)
- --------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*


- --------------------------------------------------------------------------------

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          29.14%

- --------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON*
             IN

- --------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>

 CUSIP No. 423501 105                       13D      Page  6 of 18 Pages


- --------------------------------------------------------------------------------
 1        NAME OF REPORTING PERSONS
          I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

          Redwood Holdings, Inc.

- --------------------------------------------------------------------------------

 2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) [x]
                                                               (b) [ ]

- --------------------------------------------------------------------------------

 3        SEC USE ONLY

- --------------------------------------------------------------------------------

 4        SOURCE OF FUNDS*

             PF
- --------------------------------------------------------------------------------

 5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
          TO ITEM 2(d) or 2(e)                                              [ ]

- --------------------------------------------------------------------------------

 6        CITIZENSHIP OR PLACE OF ORGANIZATION

             Ohio corporation

- --------------------------------------------------------------------------------

                              7      SOLE VOTING POWER

         NUMBER OF                   -0-
          SHARES
       BENEFICIALLY           8      SHARED VOTING POWER
         OWNED BY
           EACH                      2,787,842 - See Item 5(V)(b)
         REPORTING
        PERSON WITH           9      SOLE DISPOSITIVE POWER

                                     -0-

                             10      SHARED DISPOSITIVE POWER

                                     926,007
- --------------------------------------------------------------------------------

11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          2,787,842 - See Item 5(V)(a)
- --------------------------------------------------------------------------------

12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                                  [ ]

- --------------------------------------------------------------------------------

13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          29.14%
- --------------------------------------------------------------------------------

14        TYPE OF REPORTING PERSON*
             IN

- --------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>




Item 1.  Security and Issuer.

         This  Schedule 13D relates to the Common Stock of Hemagen  Diagnostics,
Inc., a Delaware corporation.  Hemagen's principal executive offices are located
at 34-40 Bear Hill Road, Waltham, Massachusetts, 02451.

Item 2.  Identity and Background.

                  Jerry L. Ruyan

                  (a)      Jerry L. Ruyan

                  (b)      9468 Montgomery Road, Cincinnati, Ohio 45242

                  (c)      Mr.  Ruyan is  primarily  engaged in the  business of
                           investing  in  businesses   which  he  believes  will
                           improve  with  better  management.  He  conducts  his
                           investment  activities from the address listed in (b)
                           above.  Mr.  Ruyan also serves as  Hemagen's  CEO and
                           Chairman of the Board of Directors.

                  (d)      Mr. Ruyan,  during the last five years,  has not been
                           convicted in a criminal proceeding, excluding traffic
                           violations or similar misdemeanors.

                  (e)      Mr. Ruyan, during the last five years, has not been a
                           party  to  a  civil   proceeding  of  a  judicial  or
                           administrative  body of competent  jurisdiction which
                           resulted in Mr.  Ruyan being at any time subject to a
                           judgment,  decree  or final  order  enjoining  future
                           violations of, or prohibiting or mandating activities
                           subject  to,  federal  or  state  securities  laws or
                           finding any violation with respect to such laws.

                  (f)      United States citizen.

                  William P. Hales

                  (a)      William P. Hales.

                  (b)      408 West 57th Street, 4A, New York, New York 10019.

                  (c)      Mr. Hales serves as Hemagen's President and is a
                           member of its Board of Directors.

                  (d)      Mr. Hales,  during the last five years,  has not been
                           convicted in a criminal proceeding, excluding traffic
                           violations or similar misdemeanors.

                  (e)      Mr. Hales, during the last five years, has not been a
                           party  to  a  civil   proceeding  of  a  judicial  or
                           administrative  body of competent  jurisdiction which
                           resulted in Mr.  Hales being at any time subject to a
                           judgment,  decree  or final  order  enjoining  future
                           violations of, or prohibiting or mandating activities
                           subject  to,  federal  or  state  securities  laws or
                           finding any violation with respect to such laws.

                  (f)      United States citizen.

                  Thomas A. Donelan

                  (a)      Thomas A. Donelan.

                  (b)      9468 Montgomery Road, Cincinnati, Ohio 45242

                  (c)      Redwood   Venture  Group,   9468   Montgomery   Road,
                           Cincinnati,  Ohio 45242. Mr. Donelan also serves as a
                           member of Hemagen's Board of Directors.

                  (d)      Mr. Donelan, during the last five years, has not been
                           convicted in a criminal proceeding, excluding traffic
                           violations or similar misdemeanors.

                  (e)      Mr. Donelan, during the last five years, has not been
                           a  party  to a  civil  proceeding  of a  judicial  or
                           administrative  body of competent  jurisdiction which
                           resulted in Mr.  Donelan being at any time subject to
                           a judgment,  decree or final order  enjoining  future
                           violations of, or prohibiting or mandating activities
                           subject  to,  federal  or  state  securities  laws or
                           finding any violation with respect to such laws.

                  (f)      United States citizen.

                  Christopher P. Hendy

                  (a)      Christopher P. Hendy.

                  (b)      9468 Montgomery Road, Cincinnati, Ohio 45242

                  (c)      Redwood   Venture  Group,   9468   Montgomery   Road,
                           Cincinnati,  Ohio 45242.  Mr.  Hendy also serves as a
                           member of Hemagen's Board of Directors.

                  (d)      Mr. Hendy,  during the last five years,  has not been
                           convicted in a criminal proceeding, excluding traffic
                           violations or similar misdemeanors.

                  (e)      Mr. Hendy, during the last five years, has not been a
                           party  to  a  civil   proceeding  of  a  judicial  or
                           administrative  body of competent  jurisdiction which
                           resulted in Mr.  Hendy being at any time subject to a
                           judgment,  decree  or final  order  enjoining  future
                           violations of, or prohibiting or mandating activities
                           subject  to,  federal  or  state  securities  laws or
                           finding any violation with respect to such laws.

                  (f)      United States citizen.

                  Redwood Holdings, Inc.

                  (a)      Redwood Holdings, Inc.

                  (b)      9468 Montgomery Road, Cincinnati, Ohio 45242

                  (c)      Redwood Holdings,  Inc. is a 100% owned subsidiary of
                           an employee  stock  ownership  plan,  the  beneficial
                           owners of which are Jerry L. Ruyan - 49.9%, Thomas A.
                           Donelan - 24.9%  and  Christopher  P.  Hendy - 24.9%.
                           Redwood  Holdings,  Inc.'s address is Redwood Venture
                           Group, 9468 Montgomery Road, Cincinnati, Ohio 45242.

                  (d)      Redwood  Holdings,  Inc., during the last five years,
                           has not  been  convicted  in a  criminal  proceeding,
                           excluding traffic violations or similar misdemeanors.

                  (e)      Redwood  Holdings,  Inc., during the last five years,
                           has not  been a  party  to a  civil  proceeding  of a
                           judicial   or   administrative   body  of   competent
                           jurisdiction which resulted in Redwood Holdings, Inc.
                           being at any time  subject to a  judgment,  decree or
                           final  order  enjoining  future   violations  of,  or
                           prohibiting  or  mandating   activities  subject  to,
                           federal  or  state  securities  laws or  finding  any
                           violation with respect to such laws.

                  (f)      Ohio corporation.

Item 3.  Source and Amount of Funds or Other Consideration.

     Redwood Holdings,  Inc. and Messrs.  Ruyan,  Hales,  Donelan and Hendy have
utilized  personal funds in connection  with  acquisitions to date of the Common
Stock.

Item 4.  Purpose of Transaction.

     William P. Hales,  Redwood  Holdings,  Inc.  and certain of its  employees,
namely,  Jerry L. Ruyan,  Thomas A. Donelan and  Christopher P. Hendy (Hales and
the employees of Redwood Holdings,  Inc. are collectively  referred to sometimes
hereafter  as  the  "Redwood   Nominees")   solicited   written   consents  from
shareholders of Hemagen  seeking  several changes to its Bylaws,  the removal of
its  directors  and the  election  of the  Redwood  Nominees.  The  solicitation
commenced  July 20, 1999 and was opposed by Hemagen.  Following  the delivery of
consents by the Redwood Nominees and their initiation of litigation,  the matter
was settled pursuant to a Settlement Agreement entered into September 30, 1999.

     Under the Settlement  Agreement,  four of Hemagen's six directors,  namely,
Carl Franzblau,  Lawrence Gilbert, Charles W. Smith and Paul N. Fruitt, resigned
and were  replaced by Jerry L. Ruyan,  William P. Hales,  Thomas A.  Donelan and
Christopher P. Hendy.  The new Board of Directors then elected Jerry L. Ruyan as
Chairman and CEO and William P. Hales as President.

     The  newly-reconstituted   Board,  in  accordance  with  the  authorization
previously given by shareholders in the consent solicitation  referred to above,
then granted  options to purchase its common stock at an exercise price of $1.36
per  share,  expiring  September  30,  2009 and  becoming  exercisable  upon the
earliest to occur of March 31, 2001,  when the price of  Hemagen's  common stock
trades  above $5 per share for 20  consecutive  trading days or upon a change in
control of Hemagen. The option grant was to Redwood Holdings, Inc. to the extent
of 866,007 shares and William P. Hales to the extent of 866,007 shares.

     The Board next resolved to reimburse the Redwood Group for its expenditures
in the consent  solicitation  of up to  $300,000,  with the actual  amount to be
determined  by  adequate  documentation  and with  payment  to be in  shares  of
Hemagen's  common  stock  at the  average  of the  closing  prices  on the  five
preceding trading days, namely, $1.06875 per share.

     Redwood Holdings,  Inc. and Messrs. Ruyan, Hales, Donelan and Hendy own the
securities reported in this Schedule 13D for the purpose of controlling Hemagen.
Redwood  Holdings,  Inc. and Messrs.  Ruyan,  Hales,  Donelan and Hendy may also
acquire additional  securities of Hemagen from  time-to-time.  They will monitor
their investment in Hemagen and, in the future, may make additional acquisitions
or dispositions of that stock.

     Except as set forth above,  they do not have any plans or  proposals  which
relate to or would result in:

     4.1  The acquisition by any person of additional  securities of the issuer,
          or the disposition of securities of the issuer;

     4.2  An   extraordinary   corporation   transaction,   such  as  a  merger,
          reorganization  or  liquidation,  involving  the  issuer or any of its
          subsidiaries;

     4.3  A sale or transfer of a material  amount of assets of the issuer or of
          any of its subsidiaries;

     4.4  Any change in the present  board of  directors  or  management  of the
          issuer,  including any plans or proposals to change the number or term
          of directors or to fill any existing vacancies on the board;

     4.5  Any material change in the present  capitalization  or dividend policy
          of the issuer;

     4.6  Any  other  material  change in the  issuer's  business  or  corporate
          structure;

     4.7  Changes in the issuer's charter,  bylaws or instruments  corresponding
          thereto or other actions which may impede the  acquisition  of control
          of the issuer by any person;

     4.8  Causing a class of  securities  of the  issuer to be  delisted  from a
          national securities exchange or to cease to be authorized to be quoted
          in  an  inter-dealer   quotation  system  of  a  registered   national
          securities association;



<PAGE>


     4.9  A class of equity  securities  of the  issuer  becoming  eligible  for
          termination of registration  pursuant to Section  12(g)(4) of the Act;
          or

     4.10 Any action similar to any of those enumerated above.

Item 5.  Interest in Securities of Issuer.

                  I.       Jerry L. Ruyan

                  (a)      See page 2, nos. 11 and 13.  No. 11 includes 182,227
                           warrants to purchase Common Stock and 1,732,014
                           options to purchase Common Stock.

                  (b)      See  page  2,  nos.  7-10.  No.  8  includes  182,227
                           warrants  to  purchase  Common  Stock  and  1,732,014
                           options  to  purchase  Common  Stock.  No. 9 includes
                           72,727  warrants to  purchase  Common  Stock.  No. 10
                           includes  866,007  options to purchase  Common Stock.
                           All  of  the  options  mentioned  in  this  Item  are
                           exercisable  at $1.36 per share upon the  earliest of
                           March 31,  2001,  when the price of the Common  Stock
                           trades  above $5 per  share  for  twenty  consecutive
                           trading  days or upon a change in  control of Hemagen
                           and expire  September  30, 2009.  All of the warrants
                           mentioned in this Item are currently  exercisable  at
                           $2.75 per share and expire February 28, 2001.

                  (c)      All of the following trades were made in the last 60
                           days:

              ---------- --------------- ------------------- ------------------
                 Date      Transaction     Number of Shares    Price Per Share
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             10,000             2-11/32
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             10,000              2-9/32
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             10,000              2-1/4
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             19,900              2-3/16
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             20,000              2-3/8
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             20,000              2-5/16
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             15,000               2.01
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale            136,627               2.01
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale                500             2.31250
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale              8,000             2.18750
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale              6,900             2.21870
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale             15,000             2.15620
              ---------- --------------- ------------------- ------------------
                9/3/99         Sale                500             2.28120
              ---------- --------------- ------------------- ------------------
               9/14/99       Purchase            7,850             1.25
              ---------- --------------- ------------------- ------------------
               9/30/99       Purchase           387,801             1.125
              ---------- --------------- ------------------- ------------------

                           All transactions  were  made in the  open  market
                           except that the purchase of 387,801 shares occurred
                           in a private transaction.

                  (d)      None.

                  (e)      Not Applicable.

                  II.      William P. Hales

                  (a)      See page 3, nos. 11 and 13.  No. 11 includes 182,227
                           warrants to purchase Common Stock and 1,732,014
                           options to purchase Common Stock.

                  (b)      See  page  3,  nos.  7-10.  No.  8  includes  182,227
                           warrants  to  purchase  Common  Stock  and  1,732,014
                           options  to  purchase  Common  Stock.  No. 9 includes
                           49,500  warrants to purchase Common Stock and 866,007
                           options to purchase Common Stock.  All of the options
                           mentioned in this Item are  exercisable  at $1.36 per
                           share upon the earliest of March 31,  2001,  when the
                           price of the Common  Stock  trades above $5 per share
                           for twenty consecutive  trading days or upon a change
                           in control of Hemagen and expire  September 30, 2009.
                           All  of the  warrants  mentioned  in  this  Item  are
                           currently exercisable at $2.75 per share and
                           effective February 28, 2001.

                  (c)      All of the following trades in the Common Stock were
                           made in the last 60 days:

                 ---------- -------------- ------------------ ------------------
                    Date     Transaction    Number of Shares   Price Per Share
                 ---------- -------------- ------------------ ------------------
                   9/3/99        Sale           180,700                2.04
                 ---------- -------------- ------------------ ------------------
                   9/3/99        Sale            19,400                2.04
                 ---------- -------------- ------------------ ------------------
                  9/14/99      Purchase           7,850                1.25
                 ---------- -------------- ------------------ ------------------
                  9/16/99      Purchase          30,000                1.75
                 ---------- -------------- ------------------ ------------------
                  9/16/99      Purchase          30,000*               .50
                 ---------- -------------- ------------------ ------------------
                  9/30/99      Purchase         250,000               1.125
                 ---------- -------------- ------------------ ------------------
                  9/30/99    Option Grant       866,007                N.A.
                 ---------- -------------- ------------------ ------------------

                    *Warrants

               All transactions were made in the open  market except that the
               purchase of 250,000 shares occurred in a private transaction.

                  (d)      None.

                  (e)      Not Applicable.

                  III.     Thomas A. Donelan

                  (a)      See page 4, nos. 11 and 13.  No. 11 includes 182,227
                           warrants to purchase Common Stock and 1,732,014
                           options to purchase Common Stock.

                  (b)      See  page  4,  nos.  7-10.  No.  8  includes  182,227
                           warrants  to  purchase  Common  Stock  and  1,732,014
                           options to  purchase  Common  Stock.  No. 10 includes
                           866,007 options to purchase Common Stock.  All of the
                           options  mentioned  in this Item are  exercisable  at
                           $1.36 per share upon the  earliest of March 31, 2001,
                           when the price of the Common  Stock  trades  above $5
                           per share for twenty consecutive trading days or upon
                           a change in control of Hemagen  and expire  September
                           30, 2009. All of the warrants  mentioned in this Item
                           are currently exercisable at $2.75 per share and
                           effective February 28, 2001.

                  (c)      All of the following trades were made in the last 60
                           days:

                       ------- ------------- ------------------ ----------------
                         Date   Transaction   Number of Shares   Price Per Share
                       ------- ------------- ------------------ ----------------
                        9/3/99      Sale            5,000            2-9/32
                       ------- ------------- ------------------ ----------------
                        9/3/99      Sale           30,100             2-1/4
                       ------- ------------- ------------------ ----------------
                        9/3/99      Sale            9,000            2-7/16
                       ------- ------------- ------------------ ----------------
                        9/3/99      Sale            2,000             2-3/8
                       ------- ------------- ------------------ ----------------
                        9/3/99      Sale            4,000            2-5/16
                       ------- ------------- ------------------ ----------------
                        9/9/99    Purchase         10,000             1-1/4
                       ------- ------------- ------------------ ----------------
                       9/30/99    Purchase         70,000             1-1/8
                       ------- ------------- ------------------ ----------------


<PAGE>




                           All transactions  before 9/30/99 occurred in the open
                           market.  The 9/30/99  purchase  occurred in a private
                           transaction.

                           (d)  None.

                           (e)  Not Applicable.

                  IV.  Christopher P. Hendy

                    (a)  See page 5, nos.  11 and 13.  No. 11  includes  182,227
                         warrants to purchase Common Stock and 1,732,014 options
                         to purchase Common Stock.

                    (b)  See page 5, nos. 7-10. No. 8 includes  182,227 warrants
                         to  purchase  Common  Stock and  1,732,014  options  to
                         purchase Common Stock.  No. 10 includes 866,007 options
                         to purchase Common Stock. All of the options  mentioned
                         in this Item are  exercisable  at $1.36 per share  upon
                         the earliest of March 31,  2001,  when the price of the
                         Common  Stock  trades  above $5 per  share  for  twenty
                         consecutive trading days or upon a change in control of
                         Hemagen  and  expire  September  30,  2009.  All of the
                         warrants   mentioned   in  this   Item  are   currently
                         exercisable  at $2.75 per share and expire  February
                         28, 2001.

                    (c)  All of the  following  trades  were made in the last 60
                         days:

                  --------- -------------- ------------------ ------------------
                     Date    Transaction    Number of Shares    Price Per Share
                  --------- -------------- ------------------ ------------------
                    9/3/99       Sale            25,000               2-3/8
                  --------- -------------- ------------------ ------------------
                    9/3/99       Sale             9,900             2-13/32
                  --------- -------------- ------------------ ------------------
                    9/3/99       Sale             5,100              2-3/16
                  --------- -------------- ------------------ ------------------
                    9/9/99     Purchase          10,000               1-1/4
                  --------- -------------- ------------------ ------------------
                   9/30/99     Purchase          70,000               1-1/8
                  --------- -------------- ------------------ ------------------

                    All transactions before 9/30/99 occurred in the open market.
                    The 9/30/99 purchase occurred in a private transaction.

                    (d)  None.

                    (e)  Not Applicable.

          V.   Redwood Holdings, Inc.

                    (a)  See page 6, nos.  11 and 13.  No. 11  includes  182,227
                         warrants to purchase Common Stock and 1,732,014 options
                         to purchase Common Stock.

                    (b)  See page 5, nos. 7-10. No. 8 includes  182,227 warrants
                         to  purchase  Common  Stock and  1,732,014  options  to
                         purchase Common Stock. All of the options  mentioned in
                         this Item are  exercisable  at $1.36 per share upon the
                         earliest  of March  31,  2001,  when  the  price of the
                         Common  Stock  trades  above $5 per  share  for  twenty
                         consecutive trading days or upon a change in control of
                         Hemagen  and  expire  September  30,  2009.  All of the
                         warrants   mentioned   in  this   Item  are   currently
                         exercisable at $2.75 per share and expire  February 28,
                         2001.  No. 9 includes the  securities  described in (c)
                         below.

                    (c)  All of the  following  trades  were made in the last 60
                         days:

                  --------- -------------- ------------------ ------------------
                     Date    Transaction    Number of Shares    Price Per Share
                  --------- -------------- ------------------ ------------------
                    9/16/99   Purchase           30,000               1-3/4
                  --------- -------------- ------------------ ------------------
                    9/16/99   Purchase           30,000*               .50
                  --------- -------------- ------------------ ------------------
                    9/30/99   Option Grant     866,007                 N.A.
                  --------- -------------- ------------------ ------------------

                         *Warrants

                    (d)  None.

                    (e)  Not Applicable.

          VI.  Redwood  Holdings,  Inc. and Messrs.  Ruyan,  Hales,  Donelan and
               Hendy

                    (a)  2,652,142 shares or 27.9%. Includes 182,227 warrants to
                         purchase Common Stock and 1,732,014 options to purchase
                         Common Stock.

                    (b)  See  pages  2-6,  nos.  7-10.  Items  8 and 11  include
                         warrants to purchase 182,227 shares of Common Stock and
                         1,732,014  options to purchase Common Stock. All of the
                         options mentioned in this Item are exercisable upon the
                         earliest  of March  31,  2001,  when  the  price of the
                         Common  Stock  trades  above $5 per  share  for  twenty
                         consecutive trading days or upon a change in control of
                         Hemagen  and  expire  September  30,  2009.  All of the
                         warrants   mentioned   in  this   Item  are   currently
                         exercisable  at $2.75 per share and expire  February
                         28, 2001.

                    (c)  See I(c), II(c), III(c), IV(c) and V(c) above.

                    (d)  None.

                    (e)  Not Applicable.



<PAGE>




Item 6. Contracts, Arrangements, Understandings or Relationships with respect to
        Securities of the Issuer.

     Redwood Holdings,  Inc. and Messrs.  Ruyan,  Hales,  Donelan and Hendy have
agreed to vote their shares and act in concert with respect to their  objectives
as to Hemagen.

Item 7. Material to be filed as Exhibits.

     1.   Powers of  Attorney  executed in  connection  with  filings  under the
          Securities Exchange Act of 1934

     2.   Agreement  required  pursuant to  Regulation  Section  240.13d-1(f)(1)
          promulgated under the Securities Exchange Act of 1934.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]



<PAGE>





Dated: October 11, 1999                       *
                                            ------------------------------------
                                            Jerry L. Ruyan


                                              *
                                            ------------------------------------
                                            William P. Hales



                                             *
                                            ------------------------------------
                                            Thomas A. Donelan



                                             *
                                            ------------------------------------
                                            Christopher P. Hendy




                                            *By:   /s/F. Mark Reuter
                                                --------------------------------
                                                      F. Mark Reuter
                                                      Attorney-in-Fact


<PAGE>






                                    EXHIBIT 1

                                POWER OF ATTORNEY


     I, JERRY L. RUYAN,  hereby  appoint GARY P. KREIDER and F. MARK REUTER,  or
either  of them,  as my true and  lawful  attorney-in-fact  to sign on my behalf
individually  and to file  with  the  Securities  and  Exchange  Commission  any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN WITNESS  WHEREOF,  I have hereunto set my hand this 11th day of October,
1999.



                                           /s/Jerry L. Ruyan
                                          ---------------------------------
                                          JERRY L. RUYAN








<PAGE>



                                    EXHIBIT 1

                                POWER OF ATTORNEY


     I, THOMAS A. DONELAN, hereby appoint GARY P. KREIDER and F. MARK REUTER, or
either  of them,  as my true and  lawful  attorney-in-fact  to sign on my behalf
individually  and to file  with  the  Securities  and  Exchange  Commission  any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN WITNESS  WHEREOF,  I have hereunto set my hand this 11th day of October,
1999.




                                               /s/Thomas A. Donelan
                                              --------------------------------
                                              THOMAS A. DONELAN








<PAGE>



                                    EXHIBIT 1

                                POWER OF ATTORNEY


     I, WILLIAM P. HALES,  hereby appoint GARY P. KREIDER and F. MARK REUTER, or
either  of them,  as my true and  lawful  attorney-in-fact  to sign on my behalf
individually  and to file  with  the  Securities  and  Exchange  Commission  any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN WITNESS  WHEREOF,  I have hereunto set my hand this 11th day of October,
1999.




                                                  /s/William P. Hales
                                                 ----------------------------
                                                 WILLIAM P. HALES


<PAGE>



                                    EXHIBIT 1

                                POWER OF ATTORNEY


     I,  CHRISTOPHER  P. HENDY,  do hereby  appoint  GARY P. KREIDER and F. MARK
REUTER, or either of them, as my true and lawful  attorney-in-fact to sign on my
behalf  individually and to file with the Securities and Exchange Commission any
schedules or other filings or amendments  thereto made by me pursuant to Section
13(d) of the Securities and Exchange Act of 1934.

     IN WITNESS  WHEREOF,  I have hereunto set my hand this 11th day of October,
1999.



                                             /s/Christopher P. Hendy
                                            --------------------------------
                                            CHRISTOPHER P. HENDY


<PAGE>



                                    EXHIBIT 1

                                POWER OF ATTORNEY


     As  President  of REDWOOD  HOLDINGS,  INC.,  I, Thomas A.  Donelan,  hereby
appoint GARY P. KREIDER and F. MARK REUTER,  or either of them,  as the true and
lawful  attorney-in-fact  of  Redwood  Holdings,  Inc.  to  sign  on its  behalf
individually  and to file  with  the  Securities  and  Exchange  Commission  any
schedules or other filings or amendments thereto made by Redwood Holdings,  Inc.
pursuant to Section 13(d) of the Securities and Exchange Act of 1934.

     IN  WITNESS  WHEREOF,  I have  hereunto  set my hand on behalf  of  Redwood
Holdings, Inc. this 11th day of October, 1999.


                                     REDWOOD HOLDINGS, INC.

                                      By: /s/ Thomas A. Donelan
                                         -----------------------------------
                                              Thomas A. Donelan
                                              President




<PAGE>



                                    EXHIBIT 2



                                    AGREEMENT


     This Agreement  ("Agreement") executed this 30th day of September,  1999 is
by and among MR.  WILLIAM P. HALES,  MR. JERRY L. RUYAN,  MR. THOMAS A. DONELAN,
MR.   CHRISTOPHER  P.  HENDY  and  REDWOOD  HOLDINGS,   INC.(collectively,   the
"Shareholders").

     WHEREAS,   as  of  the  date  of  this  Agreement,   the  Shareholders  own
approximately  27.9% of the  common  stock  (the  "Common  Stock"),  of  Hemagen
Diagnostics, Inc., a Delaware corporation;

     WHEREAS,  the Shareholders may be deemed to be the beneficial owners of the
Common Stock  pursuant to Regulation  Section  240.13d-3  promulgated  under the
Securities Exchange Act of 1934; and

     WHEREAS,  the Shareholders from time to time must file statements  pursuant
to certain  sections of the  Securities  Exchange Act of 1934  concerning  their
ownership of Common Stock.

     NOW, THEREFORE, in consideration of the premises the Shareholders agree:

     1.  That  the  Shareholders  do  hereby  agree  to file  jointly  with  the
Securities  Exchange  Commission  any  schedules or other  filings or amendments
thereto made by or on behalf of the  Shareholders  pursuant to Section  13(d) of
the Securities Exchange Act of 1934.

     2. This  Agreement  shall be governed in accordance  with the laws of Ohio,
may be amended  only in writing and may be  terminated  by either party upon ten
days written notice. In the event of termination, each party shall remain liable
for his or her shares of the expenses  incurred to the date of  termination  and
shall  promptly  pay their share of expenses,  upon  receipt of invoice,  to the
remaining party.

     IN WITNESS  WHEREOF,  the parties have executed this  Agreement on the date
set forth above.

                                               s/William P. Hales
                                               ---------------------------------
                                                 William P. Hales


                                               /s/Jerry L. Ruyan
                                               ---------------------------------
                                                  Jerry L. Ruyan


                                               /s/Thomas A. Donelan
                                               ---------------------------------
                                                  Thomas A. Donelan


                                              /s/Christopher P. Hendy
                                              ----------------------------------
                                                 Christopher P. Hendy


                                            REDWOOD HOLDINGS, INC.


                                            By:/s/ Thomas A Donelan
                                               ---------------------------------
                                                   Thomas A. Donelan
                                                   President





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