MOLECULAR DEVICES CORP
SC 13G/A, 1997-02-13
LABORATORY ANALYTICAL INSTRUMENTS
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<PAGE>
                               UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                          Washington, D.C. 20549

                                SCHEDULE 13G

        INFORMATION STATEMENT PURSUANT TO RULES 13d-1 AND 13d-2
                 UNDER THE SECURITIES EXCHANGE ACT OF 1934
                          (Amendment No. 1)*

                        Molecular Devices Corporation
                     ----------------------------------
                              (Name of Issuer)

                                   Common
                     ----------------------------------
                       (Title of Class of Securities)

                                 60851C107
                     ----------------------------------
                              (CUSIP Number)

   Check the  following box if a fee is being paid with this statement / /.  (A
fee is not required only if the filing 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.)

   *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 the disclosures provided in a prior page.

   The information  required in 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 1 of 5 Pages


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CUSIP No. 60851C107                   13G                 Page  2  of  5  Pages
          ---------                                            ---    --- 

- -------------------------------------------------------------------------------
 (1) Names of Reporting Persons.  S.S. or I.R.S. Identification Nos. of Above
     Persons

     A. Blaine Bowman
- -------------------------------------------------------------------------------
 (2) Check the Appropriate Box if a Member     (a)  / /
     of a Group*                               (b)  /X/
- -------------------------------------------------------------------------------
 (3) SEC Use Only

- -------------------------------------------------------------------------------
 (4) Citizenship or Place of Organization
     United States
- -------------------------------------------------------------------------------
Number of Shares              (5) Sole Voting
 Beneficially                       Power                  82,499
 Owned by                    --------------------------------------------------
 Each Reporting               (6) Shared Voting
 Person With                        Power        382,166 (see disclaimer of 
                                                 beneficial ownership in 
                                                 response to Item #4)
                             --------------------------------------------------
                              (7) Sole Dispositive
                                    Power                  82,499
                             --------------------------------------------------
                              (8) Shared Dispositive
                                    Power             382,166 (see disclaimer 
                                                      of beneficial ownership 
                                                      in response to Item #4)
- -------------------------------------------------------------------------------
 (9) Aggregate Amount Beneficially Owned by Each Reporting Person
     464,665
- -------------------------------------------------------------------------------
(10) Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares*

- -------------------------------------------------------------------------------
(11) Percent of Class Represented by Amount in Row (9)
     5.2%
- -------------------------------------------------------------------------------
(12) Type of Reporting Person*
     IN
- -------------------------------------------------------------------------------
                    *SEE INSTRUCTION BEFORE FILLING OUT!

                              Page 2 of 5 Pages

<PAGE>


ITEM 1(A).  NAME OF ISSUER
            Molecular Devices
- -------------------------------------------------------------------------------


ITEM 1(B).  ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES
            1311 Orleans Drive, Sunnyvale, CA
- -------------------------------------------------------------------------------


ITEM 2(A).  NAME OF PERSON(S) FILING
            A. Blaine Bowman
- -------------------------------------------------------------------------------


ITEM 2(B).  ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE
            1228 Titan Way, Sunnyvale, CA 94086
- -------------------------------------------------------------------------------


ITEM 2(C).  CITIZENSHIP
            United States
- -------------------------------------------------------------------------------


ITEM 2(D).  TITLE OF CLASS OF SECURITIES
            Common
- -------------------------------------------------------------------------------


ITEM 2(E).  CUSIP NUMBER
            60851C107
- -------------------------------------------------------------------------------


ITEM 3.  IF THIS STATEMENT IS FILED PURSUANT TO RULES 13d-1(b), OR 13d-2(b),
         CHECK WHETHER THE PERSON FILING IS A

         Not applicable.


ITEM 4.  OWNERSHIP

    (a) Amount Beneficially Owned:
        464,665
    ---------------------------------------------------------------------------

    (b) Percent of Class:
        5.2%
    ---------------------------------------------------------------------------

    (c) Number of shares as to which such person has:

          (i) sole power to vote or to direct the vote
              82,499*
              -----------------------------------------------------------------
         (ii) shared power to vote or to direct the vote
              382,166*
              -----------------------------------------------------------------
        (iii) sole power to dispose or to direct the disposition of
              82,499*
              -----------------------------------------------------------------
         (iv) shared power to dispose or to direct the disposition of
              382,166*
              -----------------------------------------------------------------

*  Includes 382,166 shares beneficially owned by Dionex, of which Mr. 
Bowman, a director of the Company, is President, Chief Executive Officer and 
a director. Mr. Bowman disclaims beneficial ownership of the Dionex shares. 
Includes 25,499 shares that may be acquired within 60 days after December 31, 
1996 pursuant to oustanding stock options.

ITEM 5.  OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

         Not applicable.
- -------------------------------------------------------------------------------

                              Page 3 of 5 Pages

<PAGE>

ITEM 6.  OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON
         Not applicable.
- -------------------------------------------------------------------------------


ITEM 7.  IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
         THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY
         Not applicable.
- -------------------------------------------------------------------------------


ITEM 8.  IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP
         Not applicable.
- -------------------------------------------------------------------------------


ITEM 9.  NOTICE OF DISSOLUTION OF GROUP
         Not applicable.
- -------------------------------------------------------------------------------


ITEM 10. CERTIFICATION
         Not applicable.
- -------------------------------------------------------------------------------

                              Page 4 of 5 Pages

<PAGE>

                                  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.

                                       2/14/97
                                       ----------------------------------------
                                       Date

                                       /s/ A. Blaine Bowman
                                       ----------------------------------------
                                       Signature

                                       A. Blaine Bowman
                                       ----------------------------------------
                                       (Name/Title)

                              Page 5 of 5 Pages


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