MAYFIELD VI INVESTMENT PARTNERS
SC 13G/A, 1997-02-14
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                  SCHEDULE 13G


                    UNDER THE SECURITIES EXCHANGE ACT OF 1934

                               (AMENDMENT NO. 1)*


                                 InControl, Inc.
- -------------------------------------------------------------------------------

                                (NAME OF ISSUER)


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

                         (TITLE OF CLASS OF SECURITIES)


                                    45336L109
- -------------------------------------------------------------------------------

                                 (CUSIP NUMBER)


*The remainder of this cover page shall be filled out for a reporting person's
initial filing of 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 cover 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>   2
CUSIP NO. 45336L109                    13G                


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Mayfield VI Investment Partners, a California Limited Partnership
            94-3060511

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            California

                                5      SOLE VOTING POWER
                                       
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 832,874      
        BENEFICIALLY                                                    
       OWNED BY EACH            7      SOLE DISPOSITIVE POWER      
         REPORTING                                                      
        PERSON WITH             8      SHARED DISPOSITIVE POWER 832,874 
                                
    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            832,874

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*


    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            4.9%

    12      TYPE OF REPORTING PERSON*

            PN

                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   3
CUSIP No.45336L109                       13G         


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Mayfield VI Management Partners, a California Limited Partnership
            94-3058675

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY

    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            California

                                5      SOLE VOTING POWER
                                       
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 832,874     
        BENEFICIALLY                                                   
       OWNED BY EACH            7      SOLE DISPOSITIVE POWER      
         REPORTING                                                     
        PERSON WITH             8      SHARED DISPOSITIVE POWER 832,874

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            832,874

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*

    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            4.9%

    12      TYPE OF REPORTING PERSON*

            PN

                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   4
CUSIP NO. 45336L109                     13G        


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Mayfield Medical Partners, a California Partnership
            94-3141068

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            California

                                5      SOLE VOTING POWER
                                       
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 120,790      
        BENEFICIALLY                                                    
       OWNED BY EACH                                                    
         REPORTING              7      SOLE DISPOSITIVE POWER       
        PERSON WITH                                                     
                                8      SHARED DISPOSITIVE POWER 120,790 

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            120,790

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*

    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            0.7%

    12      TYPE OF REPORTING PERSON*
            PN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   5
CUSIP NO. 45336L109                     13G             


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Yogen K. Dalal
            Social Security Number: ###-##-####

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            U.S.

                                5      SOLE VOTING POWER
                                       4,404
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 953,664 
        BENEFICIALLY                        
       OWNED BY EACH                   
         REPORTING                      
        PERSON WITH                                          
                                                                        
                                7      SOLE DISPOSITIVE POWER 4,404            
                                                                               
                                8      SHARED DISPOSITIVE POWER SEE NUMBER 6   
                                       ABOVE                                   

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            958,068

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*


    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            5.7%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   6
CUSIP NO. 45336L109                      13G      


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            F. Gibson Myers, Jr.
            Social Security Number: ###-##-####

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            U.S.

                                5      SOLE VOTING POWER
                                       38,538
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 953,664  
        BENEFICIALLY                        
       OWNED BY EACH                   
         REPORTING                       
        PERSON WITH                                          
                                                                             
                                7      SOLE DISPOSITIVE POWER 38,538           
                                                                               
                                8      SHARED DISPOSITIVE POWER SEE NUMBER 6   
                                       ABOVE                                   

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            992,202

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*


    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            5.9%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   7
CUSIP NO. 45336L109                   13G             


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Kevin A. Fong
            Social Security Number: ###-##-####

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            U.S.

                                5      SOLE VOTING POWER
                                       25,179
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 953,664  
        BENEFICIALLY                   
       OWNED BY EACH                    
         REPORTING                 
        PERSON WITH                                                     
                                                                                
                                7      SOLE DISPOSITIVE POWER 25,179            
                                                                                
                                8      SHARED DISPOSITIVE POWER SEE NUMBER 6    
                                       ABOVE                                    

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            978,843
    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*


    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            5.8%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   8
CUSIP NO. 45336L109                    13G         


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            William D. Unger
            Social Security Number: ###-##-####

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            U.S.

                                5      SOLE VOTING POWER
                                       28,343
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 953,664 
        BENEFICIALLY                    
       OWNED BY EACH                  
         REPORTING                          
        PERSON WITH                                           
                                                                              
                                7      SOLE DISPOSITIVE POWER 28,343          
                                                                              
                                8      SHARED DISPOSITIVE POWER SEE NUMBER 6  
                                       ABOVE                                  

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            982,007

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*


    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            5.8%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   9
CUSIP NO. 45336L109                     13G             


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Wendell G. Van Auken, III
            Social Security Number: ###-##-####

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            U.S.

                                5      SOLE VOTING POWER
                                       15,542
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 953,664  
        BENEFICIALLY                          
       OWNED BY EACH                   
         REPORTING                         
        PERSON WITH                              
                                                                                
                                7      SOLE DISPOSITIVE POWER 15,542            
                                                                                
                                8      SHARED DISPOSITIVE POWER SEE NUMBER 6    
                                       ABOVE                                    

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            969,206

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*

    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            5.7%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   10
CUSIP NO. 45336L109                   13G               


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            Michael J. Levinthal
            Social Security Number: ###-##-####

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            U.S.

                                5      SOLE VOTING POWER
                                       29,535
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 953,664
        BENEFICIALLY                        
       OWNED BY EACH                   
         REPORTING                          
        PERSON WITH                                       
                                                                              
                                7      SOLE DISPOSITIVE POWER 29,535          
                                                                              
                                8      SHARED DISPOSITIVE POWER SEE NUMBER 6  
                                       ABOVE                                  

    9       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            983,199

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*


    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            5.8%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   11
CUSIP NO. 45336L109                     13G           


    1       NAME OF REPORTING PERSON
            S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
            A. Grant Heidrich, III
            Social Security Number: ###-##-####

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                      (a)   / /
                                                                      (b)   /x/
    3       SEC USE ONLY


    4       CITIZENSHIP OR PLACE OF ORGANIZATION
            U.S.

                                5      SOLE VOTING POWER
                                       36,282
         NUMBER OF
           SHARES               6      SHARED VOTING POWER 953,664
        BENEFICIALLY                        
       OWNED BY EACH                   
         REPORTING                       
        PERSON WITH                                   
                                                                              
                                7      SOLE DISPOSITIVE POWER 36,282          
                                                                              
                                8      SHARED DISPOSITIVE POWER SEE NUMBER 6  
                                       ABOVE                                  

     9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            989,946

    10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
            SHARES*

    11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
            5.8%

    12      TYPE OF REPORTING PERSON*
            IN


                       *SEE INSTRUCTION BEFORE FILLING OUT
<PAGE>   12
ITEM 1.
         (a)      Name of Issuer:

                  InControl, Inc.


         (b)      Address of Issuer's Principal Executive Offices:

                  6675 185th Avenue, N.E.
                  Redmond, WA 98052

ITEM 2.
         (a)      Name of Person(s) Filing:

                  Mayfield VI Investment Partners, a California Limited
                  Partnership
                  Mayfield VI Management Partners, a California Limited
                  Partnership
                  Mayfield Medical Partners, a California Partnership
                  Yogen K. Dalal                     
                  Kevin A. Fong                      
                  Wendell G. Van Auken, III          
                  A. Grant Heidrich, III
                  F. Gibson Myers, Jr. 
                  William D. Unger     
                  Michael J. Levinthal 
                  (For a list of the General Partners of the above Limited
                  Partnership, See EXHIBIT C.)
         (b)      Address of Principal Office:

                  The entities and individuals listed in Item 2(a) share the
following business address:

                  The Mayfield Fund
                  2800 Sand Hill Road
                  Menlo Park, CA 94025

         (c)      Citizenship:

                  The entities listed in Item 2(a) are California Limited
                  Partnerships.
                  The individuals listed in Item 2(a) are U.S. citizens.

         (d)      Title of Class of Securities:

                  Common Stock

         (e)      CUSIP Number:  45336L109



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

         (a) / / Broker or Dealer registered under Section 15 of the Act

         (b) / / Bank as defined in section 3(a)(6) of the Act

         (c) / / Insurance Company as defined in section 3(a)(19) of the Act

<PAGE>   13
         (d) / / Investment Company registered under section 8 of the Investment
         Company Act 

         (e) / / Investment Adviser registered under section 203 of the
         Investment Advisers Act of 1940

         (f) / / Employee Benefit Plan, Pension Fund which is subject to the
         provisions of the Employee Retirement Income Security Act of 1974 or
         Endowment Fund, see Section 240.13d-1(b)(1)(ii)(F)
 
         (g) / / Parent Holding Company, in accordance with
         Section 240.13d-1(b)(ii)(G) (Note: See Item 7)

         (h) / / Group, in accordance with Section 240.13d-1(b)(1)(ii)(H)

                  N/A

ITEM 4.  OWNERSHIP

         The information regarding ownership as set forth in Items 5-9 of Pages
2-11 hereto, is hereby incorporated by reference.

         For a summary of total ownership by all Reporting Persons, see EXHIBIT
A hereto.

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

         N/A

ITEM 6.  OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
         N/A

ITEM 7.  IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
         SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.

         N/A

ITEM 8.  IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

         N/A

ITEM 9.  NOTICE OF DISSOLUTION OF GROUP

         N/A

ITEM 10. CERTIFICATION

         N/A
<PAGE>   14
                                    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.



                                                      February 13, 1997
                                                  -------------------------
                                                             Date


                                    MAYFIELD VI,
                                    A California Limited Partnership

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Authorized Signatory


                                    MAYFIELD VI MANAGEMENT PARTNERS,
                                    A California Limited Partnership

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Authorized Signatory


                                    MAYFIELD MEDICAL PARTNERS,
                                    A California Partnership

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Authorized Signatory


                                    YOGEN K. DALAL

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Attorney In Fact

                                        
                                    F. GIBSON MYERS, JR.

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Attorney In Fact

                                
                                    KEVIN A. FONG

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Attorney In Fact


                                    WILLIAM D. UNGER

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Attorney In Fact


                                    WENDELL G. VAN AUKEN, III

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Attorney In Fact


                                    MICHAEL J. LEVINTHAL

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Attorney In Fact


                                    A. GRANT HEIDRICH, III

                                    By:   /s/ George A. Pavlov
                                          --------------------------------------
                                          George A. Pavlov, Attorney In Fact












Exhibits
- ---------------
A - Beneficial Ownership of Each Reporting Person
B - Statement Appointing Designated Filer as Authorized Signatory 
C - List of General Partners





























<PAGE>   15
                                    EXHIBIT A

                  BENEFICIAL OWNERSHIP OF EACH REPORTING PERSON


<TABLE>
<CAPTION>                                        NUMBER OF SHARES    NUMBER OF SHARES         PERCENT OF CLASS          
         NAME OF REPORTING PERSON                HELD OF RECORD      BENEFICIALLY HELD       BENEFICIALLY HELD(1)
         ------------------------                ----------------    -----------------       --------------------
<S>                                                   <C>             <C>                    <C> 
Mayfield VI Investment Partners,                      832,874             832,874                  4.9%
a California Limited Partnership                                          
Mayfield VII Management Partners,                           0             832,874(2)               4.9%
a California Limited Partnership                                          
Mayfield Medical Partners,                            120,790             120,790                  0.7%
a California Partnership                                                  
Yogen K. Dalal                                          4,404             958,068(3)               5.7%
F. Gibson Myers, Jr                                    38,538             992,202(3)               5.9%
Kevin A. Fong                                          25,179             978,843(3)               5.8%
William D. Unger                                       28,343             982,007(3)               5.8%
Wendell G. Van Auken, III                              15,542             969,206(3)               5.7%
Michael J. Levinthal                                   29,535             983,199(3)               5.8%
A. Grant Heidrich, III                                 36,282             989,946(3)               5.8%
                                                    ---------           ---------                -----
Total                                               1,131,487           1,131,487                  6.7%
</TABLE>


(1) The respective percentages set forth in this column were obtained by
dividing the number of shares in the third column by the aggregate number of
outstanding shares of Common Stock, which aggregate amount, according to the
cover page of the Issuer's Quarterly Report on Form 10-Q for the three month
period ended September 30, 1996, was 16,952,827

(2) Represents shares held of record by Mayfield VI Investment Partners, of
which Mayfield VI Management Partners is the sole General Partner.

(3) The individual Reporting Persons listed in column one are Generaal Partners
of the General Partner of Mayfield VI Investment Partners and General Partners
of Mayfield Medical Partners. The shares indicated in column two represent
shares held of record by such individual Reporting Person, with sole voting and
investment power with respect thereto. The individual Reporting Persons listed
in column one may be deemed to have shared voting and dispositive power over the
832,874 shares held of record by Mayfield VI Investment Partners and the 120,790
shares held of record by Mayfield Medical Partners.



<PAGE>   16
                                  EXHIBIT B

      STATEMENT APPOINTING DESIGNATED FILER AND AUTHORIZED SIGNATORY


         Each of the undersigned entities and individuals (collectively, the
"Reporting Persons") hereby designates the entity listed in Column II of EXHIBIT
A hereto, or such other person or entity as is designated in writing by George
A. Pavlov (any such entity is referred to as the "Designated Filer") as the
beneficial owner to make filings of Schedules 13D and 13G (and any amendments
thereto) pursuant to Section 13(d) of the Securities Exchange Act of 1934 (the
"Exchange Act") and of Forms 3, 4 and 5 (and any amendments thereto) pursuant to
Section 16(a) of the Exchange Act (collectively, the "Reports") with respect to
the securities of the entities listed in Column I of EXHIBIT A hereto and with
respect to the securities of any other entity whose securities are now, or
hereafter become, publicly traded and whose securities are beneficially owned
(directly or indirectly) both by such Reporting Person and by such Designated
Entity (collectively, the "Companies").

         Each Reporting Person hereby further authorizes and designates GEORGE
A. PAVLOV (the "Authorized Signatory") to execute and file on behalf of such
Reporting Person the Reports with respect to the securities of the Companies,
including all Schedules 13D and 13G and Forms 3, 4 and 5, and any amendments
thereto, that the Reporting Person may be required to file with the United
States Securities and Exchange Commission as a result of the Reporting Person's
ownership of, or transactions in securities of the Companies.

         The authority of the Designated Filer and the Authorized Signatory
under this document with respect to each Reporting Person shall continue until
such Reporting Person is no longer required to file Schedules 13D or 13G or
Forms 3, 4 and 5 with respect to the Reporting Person's ownership of, or
transactions in, the securities of the Companies, unless earlier revoked in
writing. Each Reporting Person acknowledges that the Designated Filer and the
Authorized Signatory are not assuming any of the Reporting Person's
responsibilities to comply with Section 13(d) or Section 16 of the Exchange Act.


Date: February 10, 1997                MAYFIELD VI INVESTMENT
                                       PARTNERS,
                                       a California Limited Partnership

                                       By:  Mayfield VI Management Partners,
                                            a California Limited Partnership,
                                            Its General Partner


                                       By:  /s/ George A. Pavlov
                                            --------------------
                                            Authorized Signatory


                                        1
<PAGE>   17
Date: February 10, 1997                 MAYFIELD VI MANAGEMENT
                                        PARTNERS,
                                        a California Limited Partnership


                                        By:  /s/ George A. Pavlov
                                             ---------------------
                                             Authorized Signatory


Date: February 10, 1997                 MAYFIELD VII
                                        a California Limited Partnership

                                        By:  Mayfield VII Management Partners,
                                             a California Limited Partnership,
                                             Its General Partner


                                        By:  /s/ George A. Pavlov
                                             ---------------------
                                             Authorized Signatory


Date: February 10, 1997                 MAYFIELD VII MANAGEMENT
                                        PARTNERS,
                                        a California Limited Partnership



                                        By:  /s/ George A. Pavlov
                                             ---------------------
                                             Authorized Signatory


Date: February 10, 1997                 MAYFIELD VIII,
                                        a California Limited Partnership

                                        By:  Mayfield VIII Management, L.L.C.,
                                             Its General Partner


                                        By:  /s/ George A. Pavlov
                                             ---------------------
                                             Authorized Signatory


                                       2



<PAGE>   18
Date: February 10, 1997               MAYFIELD VIII MANAGEMENT, L.L.C.,
                                      a Delaware Limited Liability Company



                                      By:      /s/ George A. Pavlov
                                               -------------------------------
                                               Authorized Signatory


Date: February 10, 1997               MAYFIELD SOFTWARE TECHNOLOGY
                                      PARTNERS,
                                      a California Partnership

                                      By:      Mayfield VI Investment Partners,
                                               a California Limited Partnership,
                                               Its General Partner

                                      By:      Mayfield VI Management Partners,
                                               a California Limited Partnership,
                                               Its General Partner


                                      By:      /s/ George A. Pavlov
                                               --------------------------------
                                               Authorized Signatory


Date: February 10, 1997               MAYFIELD MEDICAL PARTNERS,
                                      a California Partnership

                                      By:      Mayfield VI Investment Partners,
                                               a California Limited Partnership,
                                               Its General Partner

                                      By:      Mayfield VI Management Partners,
                                               a California limited partnership,
                                               Its General Partner


                                      By:      /s/ George A. Pavlov
                                               ---------------------------------
                                               Authorized Signatory


                                       3
<PAGE>   19
Date: February 10, 1997               MAYFIELD MEDICAL PARTNERS 1992,
                                      a California Partnership

                                      By:      Mayfield VII,
                                               a California Limited Partnership,
                                               Its General Partner

                                      By:      Mayfield VI Management Partners,
                                               a California limited partnership,
                                               Its General Partner


                                      By:      /s/ George A. Pavlov
                                               -----------------------------
                                               Authorized Signatory


Date: February 10, 1997               MAYFIELD ASSOCIATES FUND,
                                      a California Limited Partnership



                                      By:      /s/ George A. Pavlov
                                               -----------------------------
                                               Authorized Signatory


Date: February 10, 1997               MAYFIELD ASSOCIATES FUND II,
                                      a California Limited Partnership



                                      By:      /s/ George A. Pavlov
                                               -----------------------------
                                               Authorized Signatory



Date: February 10, 1997               /s/ Yogen K. Dalal
                                      ---------------------------------
                                      YOGEN K. DALAL


Date: February 10, 1997               /s/ Kevin A. Fong
                                      ---------------------------------
                                      KEVIN A. FONG


                                       4
<PAGE>   20
Date: February 10, 1997              /s/ A. Grant Heidrich III
                                     ---------------------------------
                                      A. GRANT HEIDRICH III


Date: February 10, 1997              /s/ Russell C. Hirsch
                                     ---------------------------------
                                      RUSSELL C. HIRSCH


Date: February 10, 1997              /s/ Wende S. Hutton
                                     ---------------------------------
                                      WENDE S. HUTTON


Date: February 10, 1997              /s/ Michael J. Levinthal
                                     ---------------------------------
                                      MICHAEL J. LEVINTHAL


Date: February 10, 1997              /s/ F. Gibson Myers, Jr.
                                     ---------------------------------
                                      F. GIBSON MYERS, JR.


Date: February 10, 1997              /s/ William D. Unger
                                     ---------------------------------
                                      WILLIAM D. UNGER


Date: February 10, 1997              /s/ Wendell G. Van Auken III
                                     ---------------------------------
                                      WENDELL G. VAN AUKEN III


                                       5
<PAGE>   21
                                                       EXHIBIT A


<TABLE>
<CAPTION>
COLUMN I                                 COLUMN II                   PERSONS/ENTITIES ON WHOSE BEHALF
- --------                                 ---------                   --------------------------------
PUBLICLY TRADED COMPANY                  DESIGNATED FILER            THE DESIGNATED FILER MAY ACT
- -----------------------                  ----------------            --------------------------------

<S>                                      <C>                         <C>
ADVENT SOFTWARE, INC.                    MAYFIELD VII                MAYFIELD VII MANAGEMENT PARTNERS,
                                                                     MAYFIELD ASSOCIATES FUND II,
                                                                     YKD, FGM, KAF, WDU, WVA,
                                                                     MJL, AGH
BROADVISION, INC.                        MAYFIELD VII                MAYFIELD VII MANAGEMENT PARTNERS,
                                                                     MAYFIELD ASSOCIATES FUND II,
                                                                     YKD, KAF, MJL
DIGITAL GENERATION SYSTEMS,              MAYFIELD VII                MAYFIELD VII MANAGEMENT PARTNERS,
INC.                                                                 MAYFIELD ASSOCIATES FUND II,
                                                                     YKD, KAF, WDU, WVA, MJL,
                                                                     AGH
DIGITAL SYSTEMS                          MAYFIELD VI                 MAYFIELD VI MANAGEMENT PARTNERS,
INTERNATIONAL, INC.                      INVESTMENT                  MAYFIELD VII,
                                         PARTNERS                    MAYFIELD ASSOCIATES FUND,
                                                                     MAYFIELD ASSOCIATES FUND II
GYNECARE, INC.                           MAYFIELD VII                MAYFIELD VII MANAGEMENT PARTNERS,
                                                                     MAYFIELD ASSOCIATES FUND II,
                                                                     YKD, FGM, KAF, WDU, MJL,
                                                                     AGH, WSH
HEARTSTREAM, INC.                        MAYFIELD VII                MAYFIELD VII MANAGEMENT PARTNERS,
                                                                     MAYFIELD ASSOCIATES FUND II,
                                                                     YKD, FGM, KAF, WDU, WVA,
                                                                     MJL, AGH, WSH
INCONTROL, INC.                          MAYFIELD VI                 MAYFIELD VI MANAGEMENT PARTNERS,
                                         INVESTMENT                  MAYFIELD MEDICAL PARTNERS,
                                         PARTNERS                    YKD, FGM, KAF, WDU, WVA,
                                                                     MJL, AGH
MILLENNIUM                               MAYFIELD VII                MAYFIELD VII MANAGEMENT PARTNERS,
PHARMACEUTICALS, INC.                                                MAYFIELD ASSOCIATES FUND II,
                                                                     MAYFIELD MEDICAL PARTNERS 1992,
                                                                     YKD, FGM, KAF, WDU, WVA,
                                                                     MJL, AGH
</TABLE>


                                        6
<PAGE>   22
<TABLE>
<S>                                      <C>                         <C>
PRISM SOLUTIONS, INC.                    MAYFIELD VI                 MAYFIELD VI MANAGEMENT PARTNERS,
                                         INVESTMENT                  MAYFIELD ASSOCIATES FUND,
                                         PARTNERS                    MAYFIELD SOFTWARE TECHNOLOGY
                                                                     PARTNERS,
                                                                     YKD, FGM, KAF, WDU, WVA,
                                                                     MJL
SPECTRALINK CORPORATION                  MAYFIELD VI                 MAYFIELD VI MANAGEMENT PARTNERS,
                                         INVESTMENT                  MAYFIELD ASSOCIATES FUND,
                                         PARTNERS                    YKD
</TABLE>

<TABLE>
<S>                                    <C>                                           <C>
YKD  =  Yogen K. Dalal                 FGM  =  F. Gibson Myers, Jr.                   KAF  =  Kevin A. Fong
WDU  =  William D. Unger               WVA  =  Wendell G. Van Auken III               MJL  =  Michael J. Levinthal
AGH  =  A. Grant Heidrich III          WSH  =  Wende S. Hutton
</TABLE>


                                        7
<PAGE>   23
                                    EXHIBIT C

                            LIST OF GENERAL PARTNERS


The following list sets forth the General Partners with respect to certain of
the Mayfield Entities:

The General Partner of Mayfield VI Investment Partners is Mayfield VI Management
Partners. The General Partners of Mayfield VI Management Partners are:

(1) F. Gibson Myers, Jr.            (4) William D. Unger
(2) A. Grant Heidrich, III          (5) Wendell G. Van Auken, III
(3) Michael J. Levinthal            (6) Kevin A. Fong

The General Partner of Mayfield VII is Mayfield VII Management Partners. The
General Partners of Mayfield VII Management Partners are:

(1) F. Gibson Myers, Jr.            (4) William D. Unger
(2) A. Grant Heidrich, III          (5) Wendell G. Van Auken, III
(3) Michael J. Levinthal            (6) Kevin A. Fong

The General Partners of Mayfield Associates Fund are:

(1) F. Gibson Myers, Jr.            (4) William D. Unger
(2) A. Grant Heidrich, III          (5) Wendell G. Van Auken, III
(3) Michael J. Levinthal

The General Partners of Mayfield Associates Fund II are:

(1) F. Gibson Myers, Jr.            (4) William D. Unger
(2) A. Grant Heidrich, III          (5) Wendell G. Van Auken, III
(3) Michael J. Levinthal            (6) Kevin A. Fong
                                    (7) Yogen K. Dalal

The General Partner of Mayfield Medical Partners is: (1) Mayfield VI Investment
Partners (The General Partner of which has been detailed above)

The General Partner of Mayfield Medical Partners 1992 is: 
(1) Mayfield VII (The General Partner of which has been detailed above)

The General Partners of Mayfield Software Technology Partners are:
(1) Mayfield VI Investment Partners (the General Partner of which has been
detailed above)
(2) Yogen K. Dalal





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