ADVANCED PHOTONIX INC
SC 13D/A, 1997-04-11
SEMICONDUCTORS & RELATED DEVICES
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 4)*

                            ADVANCED PHOTONIX, INC.
              ----------------------------------------------------
                                (Name of Issuer)

                    Common Stock, par value $.001 per share
              ----------------------------------------------------
                         (Title of Class of Securities)

                                  00754E-10-7
                            -----------------------
                                 (CUSIP Number)

                Jeffrey P. Gray Wildman, Harrold, Allen & Dixon
                    225 West Wacker Drive, Chicago, IL 60606
              ----------------------------------------------------
                 (Name, Address and Telephone Number of Person
                Authorized to Receive Notice and Communications)

                                 March 12, 1997
             ------------------------------------------------------
            (Dates of Events which Require Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule  because of Rule 13d-1(b)(3) or (4), check the following box [ ]. Check
the  following  box if a fee is being paid with the statement [ ]. (A fee is not
required  only if the  reporting  person:  (1) has a previous  statement on file
reporting  beneficial  ownership  of more  than  five  percent  of the  class of
securities  described  in Item 1;  and (2) has  filed  no  amendment  subsequent
thereto reporting  beneficial  ownership of five percent or less of such class.)
(See Rule 13d-7).  Note: Six copies of this  statement,  including all exhibits,
should be filed with the Commission. See Rule 13d-1(a) for other parties to whom
copies are to be sent.  

* The remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures  provided  in a prior cover page.  The  information  required on the
remainder  of this cover page shall not be deemed to be "filed"  for the purpose
of Section  18 of the  Securities  Exchange  Act of 1934  ("Act")  or  otherwise
subject to the  liabilities  of that  section of the Act but shall be subject to
all other provisions of the Act (however, see the Notes).

<PAGE>


                                  SCHEDULE 13D
 --------------------                                        ------------------
CUSIP NO. 00754E-10-7                                 Page   2   of   3   Pages


1  NAME OF REPORTING PERSON                                     HAYDEN LEASON
   S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON            ###-##-####

- --------------------------------------------------------------------------------
2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP                 (a)   [   ]
                                                                     (b)  [   ]
- --------------------------------------------------------------------------------
3  SEC USE ONLY

- --------------------------------------------------------------------------------
4  SOURCE OF FUNDS*
                                                PF

- --------------------------------------------------------------------------------
5  CHECK THE BOX IF DISCLOSURE OF LEGAL  PROCEEDINGS  IS REQUIRED  PURSUANT TO
   ITEMS 2(d) OR 2(e)

- --------------------------------------------------------------------------------
6  CITIZENSHIP OR PLACE OF ORGANIZATION
     United States
- --------------------------------------------------------------------------------


 NUMBER OF               7    SOLE VOTING POWER
                              1,304,100 
  SHARES                                                                     
                        ______________________________________________________ 
BENEFICIALLY             
                         8    SHARED VOTING POWER
 OWNED BY
                        ______________________________________________________  
   EACH                  9    SOLE DISPOSITIVE POWER
                              1,304,100
 REPORTING
                        ______________________________________________________  
PERSON WITH              10   SHARED DISPOSITIVE POWER
                         

                        ______________________________________________________



11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                1,304,100

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

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

                                                           12.0%
______________________________________________________________________________
14  TYPE OF REPORTING PERSON*
                                                            IN

______________________________________________________________________________
*SEE INSTRUCTIONS BEFORE FILLING OUT!


INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEM 1-7 (INCLUDING EXHIBITS)
OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.



This  amends  the  statement  on  Schedule  13D (the  Statement)  filed with the
Commission  by Hayden  Leason  (Leason) with respect to his ownership of Class A
Common Stock, $.001 par value per share of Advanced  Photonix,  Inc., a Delaware
corporation  (the Company).  Unless  otherwise  defined herein,  all capitalized
items herein shall have the meaning  ascribed to them in the Statement.  

Item 5.  Interest in Securities of the Issuer.

(a)  As of the date of this Statement, Leason beneficially owned an aggregate of
     1,304,100  shares of Class A Common  Stock.  Such  shares of Class A Common
     Stock  Represent  12.0%  of the  outstanding  Class A  Common  Stock of the
     Company,  based on  10,854,495  shares  of Class A  Common  Stock  actually
     outstanding as of March 12, 1997.

(b)  Leason  has sole power to vote or direct the vote and sole power to dispose
     or direct the  disposition  of all  shares of Class A Common  Stock that he
     owns.

(c)  Not Applicable

(d)  Not Applicable

(e)  Not Applicable


                                   SIGNATURE

After  reasonable  inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

DATE: April 4, 1997


                                                            /s/ Hayden Leason
                                                            -----------------
                                                                Hayden Leason

<PAGE>


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