CHATCOM INC
SC 13D/A, 1996-05-03
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                                        
                          (Amendment No. 6)
                          --------------------



              Chatcom, Inc. (formerly Astro Sciences Corporation
              -----------------------------------------------------
                                (Name of Issuer)

                          Common Stock, no par value
            --------------------------------------------------------
                         (Title of Class of Securities)

                                  161723101
           ----------------------------------------------------------
                                 (CUSIP Number)

                Nadine Shaoul, D.H. Blair Investment Banking Corp.
                44 Wall Street, New York, NY  10005 (212) 495-4163
         ------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                 Authorized to Receive Notices and Communications)

                             May 1, 1996
          -----------------------------------------------------------
            (Date of Event which Requires FIling of this Statement)


If the filing  person has  previously  filed a statement on Schedule 13G to
report the acquisition  which is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(b) (3) or (4), check the following box [ ].

 
Check the following box if a fee is being paid with this statement [ ].(A fee
is not required only if the reporting person:  (1) has a previous  statement
on file reporting beneficial ownership of more than five percent of the class of
securities  described  in Item 1;  and (2) has  filed  no  amendment  subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

Note: Six copies of this statement, including all exhibits, should be filed
with the Commission.  See Rule 13d-1(a) for other parties to whom copies are
to be sent.


*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter 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 1 of 6 pages

 
<PAGE>

CUSIP No.  161723101                 13D                   Page 2 of 6 Pages



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

       J. Morton Davis


- --------------------------------------------------------------------------------
   2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [  ]


- --------------------------------------------------------------------------------
   3   SEC USE ONLY


- -------------------------------------------------------------------------------
   4   Source of Funds

       See Item #3 herein.

- -------------------------------------------------------------------------------
   5   Check Box if Disclosure of Legal Proceedings is required pursuant to
       Items 2(d) or 2(e)


- -------------------------------------------------------------------------------
   6   CITIZENSHIP OR PLACE OF ORGANIZATION

       United States

- --------------------------------------------------------------------------------
   NUMBER OF      7    SOLE VOTING POWER
     SHARES            2,120,200
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      8    SHARED VOTING POWER
      EACH             0
   REPORTING      --------------------------------------------------------------
     PERSON       9    SOLE DISPOSITIVE POWER
      WITH             2,120,000
                  --------------------------------------------------------------
                  10   SHARED DISPOSITIVE POWER
                       0
- --------------------------------------------------------------------------------
   11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      2,120,200
- --------------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

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

                    33.1%
- --------------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*
                    IN

- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT

<PAGE>

CUSIP No.  161723101                 13D                   Page 3 of 6 Pages



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

       D.H. Blair Holdings, Inc.


- --------------------------------------------------------------------------------
   2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [  ]


- --------------------------------------------------------------------------------
   3   SEC USE ONLY


- -------------------------------------------------------------------------------
   4   Source of Funds

       See Item #3 herein.

- -------------------------------------------------------------------------------
   5   Check Box if Disclosure of Legal Proceedings is required pursuant to
       Items 2(d) or 2(e)


- -------------------------------------------------------------------------------
   6   CITIZENSHIP OR PLACE OF ORGANIZATION

       New York

- --------------------------------------------------------------------------------
   NUMBER OF      7    SOLE VOTING POWER
     SHARES            0
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      8    SHARED VOTING POWER
      EACH             0
   REPORTING      --------------------------------------------------------------
     PERSON       9    SOLE DISPOSITIVE POWER
      WITH             0
                  --------------------------------------------------------------
                  10   SHARED DISPOSITIVE POWER
                       0
- --------------------------------------------------------------------------------
   11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                       0
- --------------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*


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

                    0%
- --------------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*
                    HC
 
- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT

<PAGE>

CUSIP No.  161723101                 13D           Page 4 of 6 Pages



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

       D.H. Blair Investment Banking Corp.


- --------------------------------------------------------------------------------
   2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                             (a)  [  ]
                                                             (b)  [  ]


- --------------------------------------------------------------------------------
   3   SEC USE ONLY


- -------------------------------------------------------------------------------
   4   Source of Funds

       See Item #3 herein.

- -------------------------------------------------------------------------------
   5   Check Box if Disclosure of Legal Proceedings is required pursuant to
       Items 2(d) or 2(e)

       
- -------------------------------------------------------------------------------
   6   CITIZENSHIP OR PLACE OF ORGANIZATION

       New York

- --------------------------------------------------------------------------------
   NUMBER OF      7    SOLE VOTING POWER
     SHARES            0
  BENEFICIALLY    --------------------------------------------------------------
    OWNED BY      8    SHARED VOTING POWER
      EACH             2,120,200
   REPORTING      --------------------------------------------------------------
     PERSON       9    SOLE DISPOSITIVE POWER
      WITH             0
                  --------------------------------------------------------------
                  10   SHARED DISPOSITIVE POWER
                       2,120,200
- --------------------------------------------------------------------------------
   11  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      2,120,200
- --------------------------------------------------------------------------------
  12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES*

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

                    33.1%
- --------------------------------------------------------------------------------
  14   TYPE OF REPORTING PERSON*
                    BD

- --------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT
<PAGE>
                                                            Page 5 of 6 Pages

          J. Morton Davis,  D.H. Blair Holdings,  Inc. ("Blair  Holdings"),
          and  D.H.  Blair  Investment  Banking  Corp.   ("Blair   Investment"),
          (collectively,  the  "Reporting  Parties")  hereby amend 
          their statement on Schedule 13D relating to the common stock,
          no par value ("shares") of Chatcom, Inc. (formerly, Astro Sciences
          Corporation (the "Issuer") as follows:
 

Item 2. (c) is hereby amended in its entirety as follows:

          Mr. Davis is an investment  banker and sole  shareholder of Blair
          Investment,  a  broker-dealer  registered  under  the  Securities
          Exchange  Act of 1934.  Prior to May 1, 1996,  Blair  Holdings was
          solely owned by Mr. Davis,  and Blair  Investment  was a  wholly-owned
          subsidiary of Blair Holdings. As of May 1, 1996, Blair Holdings merged
          into Blair  Investment,  with  Blair  Investment  being the  surviving
          corporation.


Item 4. is hereby partially amended by deleting the first paragraph and
substituting this sentence therein:

          This  Amendment is filed solely to report that Blair Holdings has
          ceased  to be a  beneficial  owner of more than  five  percent  of the
          Issuer's  securities  as a result of its merger  into its  subsidiary,
          Blair Investment.

        

Item 5. (a) is hereby amended in its entirety as follows:

          As of May 1, 1996, Mr. Davis and Blair Investment may be deemed 
          to beneficially own 2,120,200 shares or 33.1% of the Issuer's shares
          issued and outstanding as follows: 1,495,200 shares and a Warrant to
          purchase 625,000 shares at a price of $.80 per share from June 25, 
          1995 to March 5, 1999.  Blair Holdings is no longer a beneficial
          owner of any of the Issuer's shares.


Item 5. (c) is hereby amended by adding the following paragraphs:

          As of May 1, 1996, Blair Holdings was merged into its
          subsidiary, Blair Investment, and is no longer in existence.

          In  the  sixty  days  prior  to  May  1,  1996,   no transactions
          were made by the Reporting Parties.

      

Item 5. (e) is hereby amended by adding the following paragraph thereto:

          On May 1, 1996, Blair Holdings ceased to be a beneficial owner of
          more than five percent of the Issuer's securities.


<PAGE>
                                                   
                                                  Page 6 of 6 pages 

                                   SIGNATURES

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


 
                                         /s/ J. Morton Davis
Date:    May 3, 1996                   _____________________________
         New York, New York             J. Morton Davis
                                        




 
                                        D.H. BLAIR HOLDINGS, INC.


                                         /s/ David Nachamie
Date:    May 3, 1996                 by_____________________________
         New York, New York              David Nachamie
                                         Treasurer
 



                                       D.H. BLAIR INVESTMENT BANKING CORP.


                                           /s/ David Nachamie
Date:    May 3, 1996                  by_____________________________
         New York, New York              David Nachamie
                                         Treasurer




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