WARBURG PINCUS ASSET MANAGEMENT INC
SC 13G/A, 1999-02-05
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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_____)*

                         Allied Healthcare Products Inc
                         ------------------------------
                                (Name of Issuer)

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

                                    01922210
                                    --------
                                 (CUSIP Number)

                                December 31, 1998
                                -----------------
             (Date of Event Which Requires Filing of this Statement)

Check the  appropriate box to designate the rule pursuant to which this Schedule
is filed:

                                [X] Rule 13d-1(b)
                                [ ] Rule 13d-1(c)
                                [ ] Rule 13d-1(d)

*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 on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).


                               Page 1 of 4 Pages



<PAGE>






- ----------------------------                         ---------------------------
CUSIP No. 01922210                    13G            Page 2 of 4 Pages
- ----------------------------                         ---------------------------

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

           Warburg Pincus Asset Management, Inc.                    13-2673503
- ---------- ---------------------------------------------------------------------
        2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                                        (a) [ ]
                                                                        (b) [ ]
           Not applicable
- ---------- ---------------------------------------------------------------------
        3  SEC USE ONLY

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

           Delaware
- -------------------- ------ ----------------------------------------------------
                         5  SOLE VOTING POWER

                            0
                     ------ ----------------------------------------------------
     NUMBER OF           6  SHARED VOTING POWER
      SHARES
   BENEFICIALLY             601,500
     OWNED BY
                     ------ ----------------------------------------------------
       EACH              7  SOLE DISPOSITIVE POWER
     REPORTING
      PERSON                601,500
       WITH
                     ------ ----------------------------------------------------
                         8  SHARED DISPOSITIVE POWER

                            0
- ---------- ---------------------------------------------------------------------
        9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           601,500
- ---------- ---------------------------------------------------------------------
       10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
           (SEE INSTRUCTIONS)
           [ ]
           Not Applicable
- ---------- ---------------------------------------------------------------------
       11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           7.70%
- ---------- ---------------------------------------------------------------------
       12  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
           IA

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


<PAGE>


Item 1(a):                 Name of Issuer:
- ----------                 ---------------

                           Allied Healthcare Products Inc.

Item 1(b):                 Address of Issuer's Principal Executive Offices:
- ----------                 ------------------------------------------------

                           1720 Sublette Avenue
                           St. Louis, MO  63110-1968


Item 2(a)                  Name of Person Filing
- ---------                  ---------------------

                           Warburg Pincus Asset Management, Inc.

Item 2(b):                 Address of Principal Business Office:
- ----------                 -------------------------------------

                           466 Lexington Avenue, New York, New York 10017

Item 2(c):                 Citizenship:
- ----------                 ------------

                           Delaware

Item 2(d):                 Title of Class of Securities:
- ----------                 -----------------------------

                           Common Stock



Item 2(e):                 CUSIP Number:
- ----------                 -------------

                           01922290

Item 3:                    If the reporting person is an investment adviser in
                           accordance with ss. 240.13d-1(b)(1)(ii)(E), check 
                           this box.  [X]

Item 4:                    Ownership:
- -------                    ----------

                           (a) Amount beneficially owned: 601,500

                           (b) Percent of class: 7.70%.

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

                                   (i)    Sole  power  to vote or to  direct
                                          the vote 0.

                                   (ii)   Shared power to vote or to direct
                                          the vote 601,500.

                                   (iii)  Sole  power  to  dispose  or to
                                          direct the dispostion of 601,500.

                                   (iv)  Shared  power to  dispose  or to
                                         direct the dispostion of 0.


Item 5:                    Ownership of Five Percent or Less of a Class:
- -------                    ---------------------------------------------

                           Not Applicable.



                               Page 3 of 4 Pages

<PAGE>


Item 6:                    Ownership of More than Five Percent on Behalf of
- -------                    ------------------------------------------------
                           Another Person:
                           ---------------

                           
                           Warburg Pincus Asset Management, Inc.        
                           ("WPAM") is an Investment Adviser registered 
                           with the United States Securities and        
                           Exchange Commission. WPAM serves as          
                           investment adviser to many accounts including
                           various registered investment companies. The 
                           securities which are the subject of this     
                           report are owned by our accounts. In this    
                           report one or more corporate accounts owned  
                           more than 5%.                                
                           
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:
- --------                   --------------

                           By signing below I certify that, to the best 
                           of my knowledge and belief, the securities   
                           referred to above were acquired and are held 
                           in the ordinary course of business and were   
                           not acquired and are not held for the purpose
                           of or with the effect of changing or         
                           influencing the control of the issuer of the 
                           securities and were not acquired and are not 
                           held in connection with or as a participant  
                           in any transaction having that purpose or    
                           effect.                                      
                           


                                    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 2, 1999



                                          By: /s/ Linda S. Iovan
                                             ----------------------
                                             Name:  Linda S. Iovan
                                             Title: Vice President

                               Page 4 of 4 Pages



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