POLLUTION RESEARCH & CONTROL CORP /CA/
SC 13D/A, 1999-08-04
INDUSTRIAL INSTRUMENTS FOR MEASUREMENT, DISPLAY, AND CONTROL
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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                SCHEDULE 13D/A
                    Under the Securities Exchange Act of 1934


                      Pollution Research and Control Corp.
- -------------------------------------------------------------------------------
                                (Name of Issuer)

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

                                   731-547-303
          -----------------------------------------------------
                                 (CUSIP Number)


         Ronald E. Patterson, 17 Prestile Place, Robbinsville, NJ 08691
- --------------------------------------------------------------------------------
(Name,  Address and Telephone Number of Person Authorized to Receive Notices and
Communications)

                                  July 16, 1999
          -------------------------------------------------------------
             (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/A, and is filing this
schedule because of Rule 13d-l(b)(3) or (4), check the following box [ ].

Note: Six copies of this statement, including all exhibits, should be filed with
the  Commission.  See Rule  13a-l(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
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>


                                   SCHEDULE 13D/A

CUSIP No.  731-547-303
          -------------
- --------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON
     S.S. OR l.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Ronald E. Patterson    ###-##-####
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                (a) [ ]
                                                                      (b) [ ]

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

- --------------------------------------------------------------------------------
4    SOURCE OF FUNDS*

     PF
- --------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO   [ ]
     ITEMS 2(d) or 2(e)

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

     U.S.A.
- --------------------------------------------------------------------------------
7    SOLE VOTING POWER

- --------------------------------------------------------------------------------
  NUMBER OF   |    |     SOLE VOTING POWER
   SHARES     |    |     560,172
BENEFICIALLY  |-----------------------------------------------------------------
  OWNED BY    |    |     SHARED VOTING POWER
    EACH      |    |     -0-
  REPORTING   |-----------------------------------------------------------------
    WITH      |    |     SOLE DISPOSITIVE POWER
              |    |     560,172
              |-----------------------------------------------------------------
              |    |     SHARED DISPOSITIVE POWER
              |    |     -0-
- --------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
     560,172
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11 EXCLUDES CERTAIN SHARES*   [ ]

- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
     14.3%
- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON*
     IN   See attached additional page 1 and 2.
- --------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT!
          INCLUDE BOTH SIDES OF THE COVER PAGE, RESPONSES TO ITEMS 1-7
       (INCLUDING EXHIBITS) OF THE SCHEDULE, AND THE SIGNATURE ATTESTATION.


<PAGE>
                                                                          Page 1


Item 1. Security and Issuer

     The class of equity securities to which this statement relates is shares of
Common  Stock,  no par  value,  of  Pollution  Research  and  Control  Corp.,  a
California  corporation (the "Company"),  whose principal  executive offices are
located at 506 Paula Avenue, Glendale, California 91201.

Item 2. Identity and Background

     (a) Name: Ronald E. Patterson

     (b) Address:

         17 Prestile Place
         Robbinsville, NJ 08691

     (c) Principal occupation: Retired

     (d) The undersigned has not, during the last five years,  been convicted in
a criminal proceeding (excluding traffic violations or similar misdemeanors).

     (e) The undersigned has not, during the last five years,  been a party to a
civil proceeding of a judicial or administrative body of competent  jurisdiction
and as a result of such  proceeding was or is subject  to a judgment,  decree or
final  order  enjoining  future  violations  of,  or  prohibiting  or  mandating
activities subject to, federal or state securities laws or finding any violation
with respect to such laws.

     (f) Citizenship: U.S.A.

Item 3. Source and Amount of Funds

     Mr.  Patterson  utilized  personal  funds for the  purchases  described  in
Item 5(c).

Item 4. Purpose of Transaction

     Mr. Patterson  acquired the Company's  securities for investment  purposes.
Mr.  Patterson  does not  have any  plans  to  engage  in any of the  activities
described in Item 4 of Schedule 13D/A.

<PAGE>
                                                                          Page 2

Item 5. Interest in Securities of the Issuer

     (a)  Mr.  Patterson  is the  beneficial  owner  of  560,172  shares  of the
Company's Common Stock (including  187,858 shares which may be acquired upon the
exercise  of  presently  exercisable  warrants),   representing  14.3%  of  the
outstanding  shares of Common  Stock of the Company,  based on 3,736,770  shares
outstanding on July 16, 1999, as advised by the Company.

     (b) Mr. Patterson has the sole power to vote or to direct the vote and sole
power to dispose or to direct the disposition of such shares.

     (c) This  Amendment  No. 1 to  Schedule  13D is being  filed to report  the
following transaction:  On July 16, 1999, Mr. Patterson purchased units from the
Company  consisting  of an aggregate of 80,000  shares of the  Company's  common
stock and warrants to purchase an aggregate  of 54,525  shares of the  Company's
common stock (the  "Warrants").  The Warrants are  currently  exercisable  at an
exercise price of $.75 per share, and all the Warrants expire on July 16, 2002.

     (d) No other  person  has the right to  receive  or the power to direct the
receipt of dividends from, or the proceeds from the sale of, the shares.

     (e) Not applicable.

Item 6. Contract,  Arrangement,  Understanding or Relationships  with Respect to
        Securities of the Issuer.

     None.

Item 7. Material to be Filed as Exhibits.

     None.

<PAGE>

                                   SIGNATURES

     After due 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: August 3, 1999



                                       /s/ Ronald E. Patterson
                                       -----------------------------------------
                                       Name: Ronald E. Patterson
                                       Title: Individual





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