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                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                 SCHEDULE 13D

                  UNDER THE SECURITIES EXCHANGE ACT OF 1934
                            (AMENDMENT NO.  16    )*
                                          --------

                           Logic Devices Incorporated
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                                (Name of Issuer)


                                  Common Stock
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                         (Title of Class of Securities)


                                  541402 10 3
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                                 (CUSIP Number)

 Joshua S. Kanter, Chicago Investments, Inc., 333 West Wacker Drive, Suite 2700
                     Chicago, Illinois 60606 (312)984-3120
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          (Name, Address and Telephone Number of Person Authorized to
                      Receive Notices and Communications)


                               September 23, 2003
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            (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 that is the subject of this Schedule 13D, and is filing
this schedule because of Sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g),
check the following box. / /

          NOTE: Schedules filed in paper format shall include a signed original
     and five copies of the schedule, including all exhibits.  See Section
     240.13d-7 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).



PERSONS WHO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED IN THIS FORM ARE
       NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY VALID
                              OMB CONTROL NUMBER.

SEC 1746 (11-02)


CUSIP NO. 541402 10 3 13D
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1   NAMES OF REPORTING PERSONS.
    I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY).
    Chicago Investments, Inc. (83-0326134)
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2   CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)
    (a) [ ]

    (b) [ ]

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3   SEC USE ONLY


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4   SOURCE OF FUNDS (See Instructions)

    N/A
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5   CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT
    TO ITEMS 2(d) OR 2(e)                                                    [ ]

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6   CITIZENSHIP OR PLACE OF ORGANIZATION

    State of Delaware
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                7   SOLE VOTING POWER
  NUMBER OF
                    475,510
   SHARES      -----------------------------------------------------------------
                8   SHARED VOTING POWER
BENEFICIALLY
                    -0-
OWNED BY EACH  -----------------------------------------------------------------
                9   SOLE DISPOSITIVE POWER
  REPORTING
                    475,510
   PERSON      -----------------------------------------------------------------
               10   SHARED DISPOSITIVE POWER
    WITH
                    -0-
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11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     475,510 shares
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12   CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
     CERTAIN SHARES (See Instructions)                                       [ ]

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13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

     7.2%
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14   TYPE OF REPORTING PERSON (See Instructions)

     CO
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ITEM 1.  SECURITY AND ISSUER.

         This Schedule relates to the shares of common stock, no par value per
share (the "Common Stock"), of Logic Devices Incorporated, a California
corporation (the "Issuer"). The principal executive offices of the Issuer are
located at 1320 Orleans Drive, Sunnyvale, California 94089.

ITEM 2.  IDENTITY AND BACKGROUND.

         This Schedule is being filed by Chicago Investments, Inc., a Delaware
corporation ("CII" or the "Reporting Person"). The principal place of business
and principal office of CII is 934 North Main Street, Sheridan, Wyoming 82801.
CII's principal business is investing in public securities.

         The names and business addresses of the officers and directors of CII
are listed on Exhibit A attached hereto. All of said individuals are United
States citizens.

         Neither the Reporting Person nor any of the parties listed on Exhibit A
has, during the last five years, been convicted in a criminal proceeding
(excluding traffic violations or similar misdemeanors), or 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 fining any violation
with respect to such laws.

ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

         N/A

ITEM 4.  PURPOSE OF TRANSACTION.

         The Reporting Person has consummated a number of transactions since the
filing of Amendment No. 15 to Schedule 13D, on October 1, 2002, including the
following sales on the open market during the last 60 days.

         On July 29, 2003, the Reporting Person sold 5,127 shares on the open
market for $7,126.53 ($1.39 per share), 500 shares on the open market for
$705.00 ($1.41 per share), 4,500 shares on the open market for $6,300.00 ($1.40
per share), and 200 shares on the open market for $290.00 ($1.45 per share). On
July 30, 2003, the Reporting Person sold 5,585 shares on the open market for
$7,874.85 ($1.41 per share) and 4,015 shares on the open market for $5,701.30
($1.42 per share). On August 19, 2003, the Reporting Person sold 3,000 shares on
the open market for $4,350.00 ($1.45 per share). On August 20, 2003, the
Reporting Person sold 6,000 shares on the open market for $8,700.00 ($1.45 per
share), and 1,000 shares on the open market for $1,460.00 ($1.46 per share). On
August 25, 2003, the Reporting Person sold 5,000 shares on the open market for
$7,300.00 ($1.46 per share). On September 3, 2003, the Reporting Person sold
4,050 shares on the open market for $6,075.00 ($1.50 per share), 2,700 shares on
the open market for $4,077.00 ($1.51 per share), 1,200 shares on the open market
for $1,824.00 ($1.52 per share), 1,000 shares on the open market for $1,530.00
($1.53 per share), 400 shares on the open market for $616.00 ($1.54 per share)
and 650 shares on the open market for $1,007.50 ($1.55 per share). On September
9, 2003, the Reporting Person sold 400 shares on the open market for $760.00
($1.90 per share). On September 23, 2003, the Reporting Person sold 3,000 shares
on the open market for $4,530.00 ($1.51 per share). On September 24, 2003, the
Reporting Person sold 4,300 shares on the open market for $6,536.00 ($1.52 per
share) and 1,990 shares on the open market for $2,985.00 ($1.50 per share).

         The Reporting Person has no present plan or proposal which relates to
or would result in:

         (a) The acquisition by any person of additional securities of the
Issuer, or the disposition of securities of the Issuer;

         (b) An extraordinary corporate transaction, such as a merger,
reorganization or liquidation, involving the Issuer or any of its subsidiaries;

         (c) A sale or transfer of a material amount of assets of the Issuer or
any of its subsidiaries;




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         (d) Any change in the present Board of Directors or management of the
Issuer, including any plans or proposals to change the number or term of
directors or to fill any existing vacancies on the Board;

         (e) Any material change in the present capitalization or dividend
policy of the Issuer;

         (f) Any other material change in the Issuer's business or corporate
structure;

         (g) Changes in the Issuer's charter, bylaws or instruments
corresponding thereto or other actions which may impede the acquisition of
control of the Issuer by any person;

         (h) Causing a class of securities of the Issuer to be delisted from a
national securities exchange or to cease to be authorized to be quoted in an
inter-dealer quotation system of a registered national securities association;

         (i) A class of equity securities of the Issuer becoming eligible for
termination of registration pursuant to Section 12(g)(4) of the Securities
Exchange Act of 1934; or

         (j) Any action similar to any of those enumerated above.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

                                                                                     
         (a)      AMOUNT BENEFICIALLY OWNED                            -                475,510 shares

                  PERCENT OF CLASS                                     -                7.2%

         (b)      NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:
                  (i)      SOLE POWER TO VOTE OR TO DIRECT THE VOTE    -                475,510 shares

                  (ii)     SHARED POWER TO VOTE OR TO DIRECT THE VOTE                     - 0 -

                  (iii)    SOLE POWER TO DISPOSE OR to DIRECT THE DISPOSITION OF  -     475,510 shares

                  (iv)     SHARED POWER TO DISPOSE OR TO DIRECT THE DISPOSITION OF -      - 0 -


         (c)      DESCRIPTION OF TRANSACTIONS

         The first paragraph under Item 4 is incorporated herein.

         (d)      OTHER PERSONS

                  None.

         (e)      DATE OF CESSATION

                  Not applicable.

ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
         TO SECURITIES OF THE ISSUER.

         There are no contracts, arrangements, understandings or relationships
between the Reporting Person and any other person with respect to any securities
of the Issuer.

ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS.

         Exhibit A - Officers and Directors of Chicago Investments, Inc.



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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.


                                 September 25, 2003
                                 --------------------------------------
                                 Date



                                 CHICAGO INVESTMENTS, INC.


                                 By:       /s/  Joshua S. Kanter
                                          -----------------------------
                                 Its:     President









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