OXBORO MEDICAL INTERNATIONAL INC
SC 13D/A, 1999-09-23
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 3 )*

                       Oxboro Medical International, Inc.
                       ----------------------------------
                                (Name of Issuer)

                          Common Stock, $0.01 par value
                          -----------------------------
                         (Title of Class of Securities)

                                   691384 20 0
                                  -------------
                                 (CUSIP Number)

                                Girard P. Miller
                           Lindquist & Vennum P.L.L.P.
                                 4200 IDS Center
                             80 South Eighth Street
                          Minneapolis, Minnesota 55402
                            Telephone: (612) 371-2467
                            -------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                       July 2, 22, 23, and August 2, 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, and is filing this
schedule because of Rule 13d-1(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 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 5 Pages


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- -------------------------------
CUSIP No.     691384 20 0
- --------------------------------------------------------------------------------
    1      NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

           CMM Properties, LLC   c/o Gary W. Copperud
           (FEIN Not required)
- --------------------------------------------------------------------------------
    2      CHECK THE APPROPRIATE BOX IF A MEMBER
           OF A GROUP (See Instructions)                                 (a) / /

                                                                         (b) /X/
- --------------------------------------------------------------------------------
    3      SEC USE ONLY
- --------------------------------------------------------------------------------
    4      SOURCE OF FUNDS (See instructions)       00 (Cash Reserves)
- --------------------------------------------------------------------------------
    5      CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS
           IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)                        / /
- --------------------------------------------------------------------------------
    6      CITIZENSHIP OR PLACE OF ORGANIZATION

           CMM Properties, LLC is a Limited Liability Company organized
           under the laws of the State of Colorado
- --------------------------------------------------------------------------------
                          7     SOLE VOTING POWER

                                                         303,545
     NUMBER OF         ---------------------------------------------------------
      SHARES              8     SHARED VOTING POWER
   BENEFICIALLY
     OWNED BY                                                -0-
       EACH            ---------------------------------------------------------
     REPORTING            9     SOLE DISPOSITIVE POWER
      PERSON
       WITH                                              303,545
                       ---------------------------------------------------------
                         10     SHARED DISPOSITIVE POWER

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

                    60,709
- --------------------------------------------------------------------------------
   12      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11)
           EXCLUDES CERTAIN SHARES (See instructions)                        /X/
- --------------------------------------------------------------------------------
   13      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
           Assuming 2,227,060 shares outstanding as of the date of the events
           which requires the filing of this statement (as presented in the
           Company's Form 10-QSB for the quarter ended June 30, 1999), the
           amount in Row 11 represents 13.63% of the outstanding shares. These
           share totals do not reflect a 1- for-5 reverse stock split, effective
           August 13, 1999.
- --------------------------------------------------------------------------------

                                Page 2 of 5 Pages


<PAGE>

- --------------------------------------------------------------------------------
   14      TYPE OF REPORTING PERSON (See instructions)

                00 (Limited Liability Company)
- --------------------------------------------------------------------------------
CUSIP No. 691384 20 0

Item 1.   Security and Issuer.

          (a)  Title of Class of Securities: Common Stock, $.01 par value

          (b)  Name of Issuer: Oxboro Medical International, Inc.

          (c)  Address of Issuer's Principal Executive Offices:

               13828 Lincoln Street, N.E.
               Ham Lake, MN 55304

Item 2.   Identity and Background.

          (a)  Name of Person Filing: CMM Properties, LLC
               c/o Gary W. Copperud

          (b)  Business Address:

               c/o Peak to Peak Financial
               1730 South College Avenue, Box 20
               Fort Collins, CO 80525

          (c)  Principal Occupation or Employment: Investments

          (d)  Conviction in a criminal proceeding during the last five years:
               No

          (e)  Subject, during the last five years, to a judgment, decree or
               final order enjoining securities laws violations: No

          (f)  Citizenship: CMM Properties, LLC is a Colorado Limited Liability
               Company

Item 3.   Source and Amount of Funds or Other Consideration.

          Cash reserves.

Item 4.   Purpose of Transaction.

          The Reporting Person acquired 23,900 shares of common stock on July 2,
          1999, July 23, 1999 in open market transactions. The Reporting Person
          also exercised an option for 20,000

                                Page 3 of 5 Pages


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          shares of common stock on August 2, 1999. These transactions were for
          investment purposes.

          (a)  On July 22, 1999, as described in the Issuer's registration
               statement on Form S-3, the Reporting Person has agreed to
               exercise purchase rights in the Issuer's Rights Offering, to the
               extent necessary to ensure the issuer satisfies the net tangible
               asset requirement to continue to be listed on the Nasdaq Smallcap
               Market.

Item 5.   INTEREST IN SECURITIES OF ISSUER

          (a)  Number and Percentage of Class beneficially owned:

               303,545 shares may be deemed beneficially owned within the
               meaning of Rule 13d-3 of the Securities Exchange Act of 1934 by
               CMM Properties, LLC and this represents 13.63% of the 2,227,060
               shares shown as outstanding in the Issuer's last Exchange Act
               filing, its Form 10-QSB for the quarter ended June 30, 1999.
               Share amounts have not been adjusted to reflect a 1-for-5 reverse
               stock split effected by the Issuer on August 13, 1999.

               In addition, under Section 13d-3(b), under some interpretations,
               the Reporting Person may be viewed as the beneficial owner of
               170,000 shares of the Issuer's Common Stock in which Kenneth
               Brimmer (who also has reported his beneficial ownership on
               Schedule 13(d)) has a beneficial interest. If combined, such
               170,000 shares and 303,545 shares, would represent 21.26% of the
               2,227,060 shares assumed to be outstanding. See Item 6 below.

               DISCLAIMER: Pursuant to Rule 13d-3, the Reporting Person
               disclaims any interest of any kind, whether beneficial or
               otherwise, in the shares of the Issuer owned beneficially by the
               entity named above.

          (b)  For information on voting and dispositive power with respect to
               the above listed shares, see Items 5-8 of the cover page.

          (c)  Recent transactions in Common Stock:

<TABLE>
<CAPTION>

               Date of Period        No. of Shares          Price or Range
               --------------        -------------         ------------------
               <S>                   <C>                   <C>
                  07/02/99               14,800            $1.03125 - $1.0625
                  07/23/99                9,100                  $1.00
                  08/02/99               20,000                  $1.00
</TABLE>

          (d)  Ability to Direct the Receipt of Dividends or the Proceeds of
               Sale of Securities:

               Not applicable.

          (e)  Last Date on Which Reporting Person Ceased to be a 5% Holder:

               Not applicable.

                                Page 4 of 5 Pages


<PAGE>


Item 6.   Contracts, Arrangements, Understandings or Relationships with Respect
          to Securities of the Issuer.

          There are no contracts, arrangements, understandings or relationships
          (legal or otherwise) among the persons named in Item 2 and between
          such persons and any person with respect to any securities of the
          Issuer, except that as described in the Issuer's Registration
          Statement on Form S-3, the Reporting Person has agreed to exercise
          purchase rights in the Issuer's Rights Offering, to the extent
          necessary to ensure that the Issuer satisfies the net tangible asset
          requirement to continue to be listed on the Nasdaq Smallcap Market. In
          addition, the Reporting Person has an informal, unwritten, non-binding
          understanding with Kenneth Brimmer, (who is mentioned in Item 5 above
          and who also is filing a Schedule 13(d)). Such understanding, to date,
          is to the effect that each will try (but not necessarily beforehand)
          to keep the other informed of any significant purchases or sales which
          such person makes, and that each will share, with the other,
          information concerning the Issuer, and requests for information
          addresses to the Issuer, which might affect the valuation of their
          respective investments.

Item 7.   Material to be Filed as Exhibits.

          (a)  Registration Statement on Form S-3 as amended of Oxboro Medical
               International, Inc. filed on July 22, 1999 is incorporated by
               reference herein.

                                    SIGNATURE

     After reasonable inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is true,
complete and correct.

Dated:   September 22, 1999.

                                         CMM PROPERTIES, LLC


                                         By: /s/  Gary W. Copperud
                                             -----------------------------
                                          Its:    Manager
                                              ----------------------------

                                Page 5 of 5 Pages



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