Exhibit 99.2.3

                             STOCK OPTION AGREEMENT
                            COVOL TECHNOLOGIES, INC,

         A. A STOCK OPTION for a total of Two Hundred Fifty Thousand (250,000)
Shares of Common Stock, par value $0.001, of Covol Technologies, Inc., a
Delaware Corporation (herein the "Company") is hereby granted to Brent M. Cook
(herein the "Optionee") on this 21st day of April, 1998.

         B. The option price as determined by the Board of Directors of the
Company is Twelve dollars and thirty-one thirty seconds ($12 31/32) per share.

         C. This Option may not be exercised if the issuance of shares of Common
Stock of the Company upon such exercise would constitute a violation of any
applicable Federal or State securities law or other law or valid regulation. The
Optionee, as a condition to his exercise of this Option, shall represent to the
Company that the shares of Common Stock of the Company that he acquires under
this Option are being acquired by him for investment and not with present view
to distribution or resale, unless counsel for the Company is then of the opinion
that such a representation is not required under the Securities Act of 1933 or
any other applicable law, regulation, or rule of any governmental agency.

         D. This Option may not be transferred in any manner otherwise than by
will or the laws of descent and distribution, and may be exercised during the
lifetime of the Optionee only by him. The terms of this Option shall be binding
upon the executors, administrators, heirs, successors, and assigns of the
Optionee.

         E. The Stock issued pursuant to this Option will vest over a 60 month
period on a pro rata basis until it is 100% vested on April 21, 2003. All Stock
which has not yet vested will be held in escrow by the Company until the Stock
is vested.

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         F. Notwithstanding the vesting provision of Paragraph "E" above, the
Stock issued pursuant to this Option shall fully vest upon the occurance of any
of the following:

                  a. Any change of control of the Company. A change in control
         shall be deemed to have taken place if, as the result of a tender
         offer, merger, consolidation, sale of assets or contested election, or
         any combination of the foregoing transactions, the persons who were
         directors of the Company immediately before the transaction shall cease
         to constitute a majority of the board of directors of the Company or
         any successor to the Company; or

                  b. Termination of the Optionee's employment with the Company
         without cause; or

                  c. Upon the death of the Optionee; or d. Upon a vote of the
         Board of Directors allowing full vesting to the optionee; or e. The
         Company becomes a controlled entity as defined by IRC Section 1239.

         G. This Option may not be exercised more than ten (10) years from the
date of its grant, and may be exercised during such term only in accordance with
the terms of this Agreement.


Date of grant: April 21, 1998                    COVOL TECHNOLOGIES, INC.

                                                 By: /s/ Stanley M. Kimball
 ATTEST:

/s/ Stephanie Fowler


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