Exhibit  31.1

                                  CERTIFICATION

I, Anil K. Jain, certify that:

1.   I have reviewed this quarterly report on Form 10-Q of APA Optics, Inc.;

2.   Based on my knowledge, this quarterly report does not contain any untrue
     statement of a material fact or omit to state a material fact necessary to
     make the statements made, in light of the circumstances under which such
     statements were made, not misleading with respect to the period covered by
     this report;

3.   Based on my knowledge, the financial statements, and other financial
     information included in this quarterly report, fairly represent in all
     material respects the financial condition, results of operations and cash
     flows of the registrant as of, and for, the periods presented in this
     report;

4.   APA Optics, Inc.'s other certifying officers and I are responsible for
     establishing and maintaining disclosure controls and procedures (as defined
     in Exchange Act Rules 13a and 15(e)) for APA Optics, Inc. and we have:

     a)   Designed such disclosure controls and procedures to ensure that
          material information relating to APA Optics, Inc., including its
          consolidated subsidiaries, is made known to us by others within those
          entities, particularly during the period in which this report is being
          prepared;

     b)   Evaluated the effectiveness of our disclosure controls and procedures
          as of a date and presented in this quarterly report our conclusions
          about the effectiveness of the disclosure controls and procedures as
          of the end of the period covered by this report based on our
          evaluation.

     c)   Disclosed in this report any change in APA Optics, Inc.'s internal
          control over financial reporting that occurred during the most recent
          fiscal quarter that has materially affected, or is reasonably likely
          to materially affect, the Company's control over financial reporting.

5.   APA Optics, Inc.'s other certifying officers and I have disclosed, based on
     our most recent evaluation of internal control over financial reporting, to
     our auditors and the audit committee of our board of directors:

     a)   All significant deficiencies and material weaknesses in the design or
          operation of internal controls over financial reporting which are
          reasonably likely to adversely affect APA Optics, Inc.'s ability to
          record, process, summarize and report financial information; and

     b)   Any fraud, whether or not material, that involves management or other
          employees who have a significant role in the registrant's internal
          controls over financial reporting.

August 12, 2004



Signature: /s/ Anil K. Jain
           ----------------
Print Name: Anil K. Jain
            ------------
Print Title: Chief Executive Officer and Chief Financial Officer
             ---------------------------------------------------


                                       20