EXHIBIT 5.1

                            DUNCAN, BLUM & ASSOCIATES
                                ATTORNEYS AT LAW
                             cduncan@sprintmail.com

Carl N. Duncan                                                     David E. Blum
5718 Tanglewood Drive                                  1863 Kalorama Road,  N.W.
Bethesda, Maryland 20817                                  Washington, D.C. 20009
(301) 263-0200                                                    (202) 232-6220
(301) 263-0300 (Fax)                                        (202) 232-7891 (Fax)

                                  May 11, 2001

Mirenco, Inc.
206 May Street
Radcliffe, Iowa 50230

Re:      Mirenco Inc. Registration Statement on Form SB-2 Relating to the
         Offer and/or Sale of 2,154,684 shares of Common Stock

Ladies and Gentlemen:

         Since June 1999, this firm has acted as securities counsel for Mirenco,
Inc. (the "Company"), an Iowa corporation organized under the Iowa General
Corporate Law, in connection with the registration under the Securities Act of
1933, as amended, of 2,154,684 shares of common stock as defined below (the
"shares") in the Company, pursuant to the referenced Registration Statement.

         You have requested our opinion regarding the legality of the shares
registered pursuant to the Registration Statement on Form SB-2 (the
"Registration Statement"). We have examined originals or copies, certified to
our satisfaction, of such records, agreements and other instruments of the
Company, certificates or public officials, certificates of the officers or other
representatives of the Company, and other documents, as we have deemed necessary
as a basis for the opinions hereinafter set forth. As to various questions of
fact material to such opinions, we have, when relevant facts were not
independently established, relied upon written certifications of officers and
references, including (but not limited to) statements contained in the
Registration Statement.

         Our opinions, insofar as they address issues of Iowa law, are based
solely upon our review of (I) the records of the Company; (ii) the Iowa General
Corporate Law; and (iii) a certified copy of the Company's February 21, 1997
Articles of Incorporation and May 13 and 15, 2000 Certificates of Amendment
thereto. Subject to the foregoing, we do not express our opinion herein
concerning any law other than the federal laws of the United States.

         We have assumed the genuineness of all signatures on documents reviewed
by or presented to us, the legal capacity of natural persons, the authenticity
of all items submitted to us as originals and the conformity with originals of
all items submitted to us as copies.

         Based upon the foregoing, we are of the opinion that:

1.   The Company is a duly organized,  validly  existing  corporation  under the
     laws of the State of Iowa.

2.   The Shares of the Company to be offered pursuant to the Prospectus  forming
     a part of the Registration  Statement are validly  authorized and when such
     Shares have been duly delivered  against payment  therefore as contemplated
     by the offer  contained  in the  Prospectus,  such  Shares  will be validly
     issued, fully paid and non-assessable under the law of Iowa.

         Our opinion is expressed as of the date hereof, and we do not assume
any obligations to update or supplement our opinion to reflect any fact or
circumstances which hereafter comes to our attention or any change in the law
that hereafter occurs.

         We hereby consent to the reference to our firm in the "Legal Matters"
section of the Prospectus and to the inclusion of this opinion as an Exhibit to
the Registration Statement.


                                   UNCAN, BLUM & ASSOCIATES



                                   By: /s/ Carl N. Duncan
                                   ----------------------
                                   Carl N. Duncan, Managing Partner