INTEG INCORP
SC 13G, 1997-02-13
INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
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<PAGE>
 
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, DC  20549

                                  SCHEDULE 13G

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)*

                               Integ Incorporated
                                (Name of Issuer)

                          Common Stock Par Value $.01
                         (Title of Class of Securities)

                                   458100104
                                 (CUSIP Number)



*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 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>

- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 2 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Oak Investment partners VI, Limited Partnership
      06-1412578  

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

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      Delaware  

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            540,032 Shares Of Common Stock
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          Not Applicable
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             540,032 Shares Of Common Stock
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          Not Applicable
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      540,032 shares of common stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.8%    

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      PN

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!



<PAGE>
 
- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 3 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Oak Associates VI, LLC
      06-1412579
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [_]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      Delaware

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          540,032 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          540,032 Shares of Common Stock

- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      540,032 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.8%     

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      OO-LLC

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!



<PAGE>
 

- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 4 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Oak VI Affiliates Fund, Limited partnership
      06-1414970
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [_]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      Delaware

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            12,600 Shares of Common Stock
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          Not Applicable
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             12,600 Shares of Common Stock
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          Not Applicable
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      12,600 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      0.1%

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      PN

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!



<PAGE>
 
- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 5 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Oak VI Affiliates, LLC
      06-1414968  
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [_]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      Delaware 

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable                  

      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          12,600 Shares of Common Stock   
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          12,600 Shares of Common Stock   
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      12,600 Shares of Common Stock   

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      0.1%     

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      OO-LLC 

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!

<PAGE>
 

- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 6 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Oak Management Corporation
      06-0990851

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

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      Delaware

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          552,632 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          552,632 Shares of Common Stock
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                          
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.95%

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      CO

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!



<PAGE>
 
- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 7 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Bandel L. Carano
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [_]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4   
      United States
- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable

      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          552,632 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          552,632 Shares of Common Stock
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
              
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.95%

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      IN

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!
<PAGE>
 
- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 8 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
      
      Gerald R. Gallagher
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [_]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      United States

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          552,632 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          552,632 Shares of Common Stock
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.95%

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      IN

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!


       
<PAGE>
 
- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G                PAGE 9 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Edward F. Glassmeyer
- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [_]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      United States

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          552,632 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.95%     

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      IN     

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!


    

<PAGE>
 

- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G               PAGE 10 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

      Fredric W. Harman

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

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      United States

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          552,632 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          552,632 Shares of Common Stock
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.95%

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      IN

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!


<PAGE>
 
- -----------------------                                  ---------------------
  CUSIP NO. 458100104                   13G               PAGE 11 OF 19 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
      Ann H. Lamont

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

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      United States

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          552,632 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          552,632 Shares of Common Stock
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.95%    

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      IN    

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!


<PAGE>
 

  CUSIP NO. 458100104                   13G                PAGE 12 OF 19 PAGES
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
      
      Eileen M. More

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

- ------------------------------------------------------------------------------
      CITIZENSHIP OR PLACE OF ORGANIZATION
 4    
      United States

- ------------------------------------------------------------------------------
                          SOLE VOTING POWER
                     5   
     NUMBER OF            Not Applicable
 
      SHARES       -----------------------------------------------------------
                          SHARED VOTING POWER
   BENEFICIALLY      6
                          552,632 Shares of Common Stock
     OWNED BY
                   -----------------------------------------------------------
       EACH               SOLE DISPOSITIVE POWER
                     7    
    REPORTING             Not Applicable
 
      PERSON       -----------------------------------------------------------
                          SHARED DISPOSITIVE POWER
       WITH          8
                          552,632 Shares of Common Stock
- ------------------------------------------------------------------------------
      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
 9  
      552,632 Shares of Common Stock

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      5.95%

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      IN

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

                     *SEE INSTRUCTION BEFORE FILLING OUT!


        
<PAGE>
 
                                                             Page 13 of 19 pages

                                  Schedule 13G
                                Amendment No. 1
                          Common Stock, Par Value $.01
                              CUSIP No. 458100104

Item 1(a)      Name of Issuer:
                   Integ Incorporated

Item 1(b)      Address of Issuer's Principal Executive Offices:
                   2800 Patton Road
                   Roseville Business Commons
                   St. Paul, MN 55113

Item 2(a)      Name of Person filing:

    Oak Investment Partners VI, Limited Partnership
    Oak Associates VI, LLC
    Oak VI Affiliates Fund, Limited Partnership
    Oak VI Affiliates, LLC
    Oak Management Corporation
    Bandel L. Carano
    Gerald R. Gallagher
    Edward F. Glassmeyer
    Fredric W. Harman
    Ann H. Lamont
    Eileen M. More

Item 2(b)      Address of Principal Business Office or, if none, Residence:

    c/o Oak Management Corporation
    One Gorham Island
    Westport, CT 06880

Item 2(c)      Citizenship:

    Please refer to Item 4 on each cover sheet for each filing person
 
Item 2(d)      Title of Class of Securities:

    Common stock, $.01 par value

Item 2(e)      CUSIP Number: 458100104

Item 3         Not Applicable.

Item 4         Ownership.

    The approximate percentages of shares of Common Stock reported as
    beneficially owned by the Reporting Entities is based upon
<PAGE>
 
    9,275,704 shares outstanding as of November 4, 1996, as reported in the
    Issuer's Quarterly Report on Form 10-Q for the fiscal quarter ended
    September 30, 1996.

    Please see Items 5, 6, 7, 8, 9 and 11 for each cover sheet for each filing
entity.

Item 5         Ownership of Five Percent or Less of a Class.

    Not applicable

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>
 
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.

Dated February 13, 1997

                              Oak Investment Partners VI,
                              Limited Partnership

                              By:   Oak Associates VI, LLC
                                    As General Partner


                              By:   /s/ Edward F. Glassmeyer
                                    -------------------------------
                                    Managing Member

                              Oak Associates VI, LLC


                              By:   /s/ Edward F. Glassmeyer
                                    --------------------------------            
                                    Managing Member


                              Oak VI Affiliates Fund, Limited
                              Partnership
 
                              By:   Oak VI Affiliates, LLC, As General Partner


                              By:   /s/ Edward F. Glassmeyer
                                    --------------------------------            
                                    Managing Member


                              Oak VI Affiliates, LLC


                              By:   /s/ Edward F. Glassmeyer
                                    --------------------------------            
                                    Managing Member
<PAGE>
 
                              OAK MANAGEMENT CORPORATION


                         By:  /s/ Edward F. Glassmeyer
                              ------------------------------------
                              Name:  Edward F. Glassmeyer
                              Title: President



                              /s/ Bandel L. Carano
                              -------------------------------------          
                              Bandel L. Carano



                              /s/ Fredric W. Harman
                              ------------------------------------
                              Fredric W. Harman



                              /s/ Gerald R. Gallagher
                              ------------------------------------
                              Gerald R. Gallagher



                              /s/ Edward F. Glassmeyer
                              ------------------------------------
                              Edward F. Glassmeyer



                              /s/ Ann H. Lamont
                              ------------------------------------
                              Ann H. Lamont



                              /s/ Eileen M. More
                              ------------------------------------
                              Eileen M. More

<PAGE>
 
                               INDEX TO EXHIBITS
                               -----------------


                                                        Page
                                                        ----


EXHIBIT A           Agreement of Reporting Persons      18
<PAGE>
 
                                   Exhibit A
                                   ---------

     Each of the undersigned hereby agrees that Amendment No. 1 to the Schedule
13G filed on the date hereof with respect to the shares of Common Stock of Integ
Incorporated has been filed on behalf of the undersigned.

Signature:
- ----------

     Dated February 13, 1997


                              Oak Investment Partners VI,
                              Limited Partnership

                              By:   Oak Associates VI, LLC
                                    As General Partner


                              By:   /s/ Edward F. Glassmeyer
                                    -------------------------------
                                    Managing Member

                              Oak Associates VI, LLC


                              By:   /s/ Edward F. Glassmeyer
                                    --------------------------------            
                                    Managing Member


                              Oak VI Affiliates Fund, Limited Partnership
 
                              By:   Oak VI Affiliates, LLC, As General Partner


                              By:   /s/ Edward F. Glassmeyer
                                    -------------------------------
                                    Managing Member


                              Oak VI Affiliates, LLC


                              By:   /s/ Edward F. Glassmeyer
                                    -------------------------------
                                    Managing Member
<PAGE>
 
                              OAK MANAGEMENT CORPORATION



                         By:  /s/ Edward F. Glassmeyer
                              ------------------------------------
                              Name:  Edward F. Glassmeyer
                              Title: President



                              /s/ Bandel L. Carano
                              -------------------------------------          
                              Bandel L. Carano



                              /s/ Fredric W. Harman
                              ------------------------------------
                              Fredric W. Harman



                              /s/ Gerald R. Gallagher
                              ------------------------------------
                              Gerald R. Gallagher



                              /s/ Edward F. Glassmeyer
                              ------------------------------------
                              Edward F. Glassmeyer



                              /s/ Ann H. Lamont
                              ------------------------------------
                              Ann H. Lamont



                              /s/ Eileen M. More
                              ------------------------------------
                              Eileen M. More


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