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                                                                    EXHIBIT 10.2

                   THIRD AMENDMENT TO ALUMINA SUPPLY AGREEMENT

      THIS THIRD AMENDMENT TO ALUMINA SUPPLY AGREEMENT (this "Amendment"), dated
as of September 7, 2001, between Glencore AG, a Swiss corporation (the
"Seller"), and Northwest Aluminum Company, an Oregon corporation (the "Buyer,"
and collectively with the Seller, the "Parties"). Capitalized terms not
otherwise defined herein shall have the meaning ascribed to them in the Alumina
Supply Agreement dated as of October 15, 1999 between the Parties ("Base
Agreement") as amended by the Amendment to Alumina Supply Agreement dated as of
October 1, 2000 ("First Amendment") and as further amended by the Second
Amendment to Alumina Supply Agreement dated as of January 5, 2001 ("Second
Amendment") (the Base Agreement as amended by the First Amendment and the Second
Amendment being the "Alumina Agreement").

                                   WITNESSETH

      WHEREAS, the Parties entered into the Alumina Agreement; and

      WHEREAS, the Parties now desire to amend the Alumina Agreement as set
forth in this Amendment.

      NOW, THEREFORE, in consideration of the foregoing and the mutual covenants
and agreements herein contained, and intending to be legally bound here, the
Parties do hereby agree as follows:

                                   ARTICLE I.
                               QUANTITY AMENDMENT

      1.1   The Buyer shall not be obligated to purchase any Alumina from Seller
in 2001.

      1.2   No later than December 15, 2001 the Buyer shall pay the Seller an
additional cancellation fee of $1,600,000 in consideration for the cancellation
as provided in Section 1.1 of this Amendment of the Buyer's obligation to
purchase 40,000 MT of Alumina from Seller in 2001.

                                   ARTICLE II.
                               GENERAL PROVISIONS

      2.1   Ratification of Alumina Agreement. The amendments set forth herein
are limited precisely as written and shall not be deemed to be a consent or
waiver to, or modification of, any other term or condition set forth in the
Alumina Agreement. Except as expressly amended hereby, all the terms and
conditions of the Alumina Agreement shall continue in full force and effect and,
as amended hereby, the Alumina Agreement is ratified and confirmed in all
respects.

      2.2   Governing Law. This Amendment shall be governed and construed in
accordance with the laws of the State of New York, excluding those relating to
choice or
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conflicts of laws and excluding the United Nations Convention for the
International Sale of Goods.

      2.3   Assignment. This Amendment is binding upon the Parties and their
respective successors and assigns. No Party may assign this Amendment or its
rights or obligations hereunder without the prior written consent of the other
Party (which consent shall not be unreasonably withheld) and any purported
assignment without such express written consent shall be null and void.

      2.4   Counterparts. This Amendment may be executed in any number of
counterparts, each of which when so executed shall be deemed to be an original
and all of which taken together shall constitute one and the same agreement.
Delivery of an executed counterpart of a signature page to this Amendment by
facsimile shall be effective as delivery of a manually executed counterpart of
this Amendment.

      IN WITNESS WHEREOF, the Parties have caused their duly authorized
representatives to execute this Third Amendment to Alumina Supply Agreement.

                                              GLENCORE AG

                                          By: ANDREW BENTLEY
                                              -----------------------
                                              Name: Andrew Bentley
                                              Title:

                                              NORTHWEST ALUMINUM COMPANY

                                          By: BRET WILSON
                                              -----------------------
                                              Name: Bret Wilson
                                              Title: President

                                      -2-Exhibit 10.20

                    ASSIGNMENT OF INVENTION AND PATENT RIGHTS

Inventor:         Garth W. Gobeli
Serial No:        PCT/US00/02845
Filing Date:      February 2, 2000

     For  valuable   consideration  received  or  to  be  received,  and  hereby
acknowledged,  GARTH W. Gobeli of 1004 Warm Sands Trail S.E.,  Albuquerque,  New
Mexico 87123, (hereinafter referred to as "Inventor"), hereby sells, assigns and
transfers unto ADVANCED OPTICS ELECTRONICS,  INC., a New Mexico corporation,  of
8301 Washington N.E., Albuquerque,  New Mexico 87113, its successors and assigns
(hereinafter  referred to as  "Assignee"),  the entire  interest  for the United
States of America and all foreign  countries,  including  all rights of priority
under the international  conventions and treaties, in and to a certain invention
or improvement  known as  Electro-Optic  Light Valve Array,  and described in an
international application filed in the United States Patent and Trademark Office
as Receiving Office for the Patent Cooperation  Treaty  Organization on February
2, 2000, as Attorney Docket No.  30737-PCT1,  and given  Application  Serial No.
PCT/US00/02845,   which  claims  priority  of  U.S.  application  serial  number
09/247,157,  filed  February 9, 1999,  and in all  Letters  Patent of the United
States  and  all  foreign  countries  which  may or  shall  be  granted  on said
invention, or any parts thereof, or on said application,  or on any provisional,
utility, divisional, continuing, continuation-in-part, reissue, reexamination or
other  applications  based in  whole or in part  thereon.  And  Inventor  agrees
hereafter to execute all applications,  amended  specifications,  deeds or other
instruments,  and  to do  all  acts  necessary  or  proper  in  Assignee's  sole
discretion  to secure to  Assignee  the grant of  Letters  Patent in the  United
States  and/or  in  other  countries  as  Assignee  may  determine  in its  sole
discretion,  with specifications and claims in such form as shall be approved by
Assignee's counsel,  and to vest and confirm in Assignee the legal and equitable
title and full use and benefit of all such patents.

     Inventor  hereby  authorizes  and requests the  attorneys of record in said
application  to insert in this  Assignment  the filing date and serial number of
said application when officially known.

     Inventor  further  agrees with  Assignee  that this  Assignment  covers all
processes,  specifications,  procedures,  techniques  and  other  knowledge  and
information  now or hereafter  to known to Inventor  which are not in the public
domain and which relate to the  above-mentioned  invention or  improvement,  its
manufacture,  uses or  embodiments,  or other matters (the "Related  Know-How").
Inventor  agrees to disclose or provide  all Related  Know-How to Assignee  when
discovered or upon request.

     Inventor further covenants the Assignee will, upon its request, be provided
promptly with all pertinent  facts and documents  relating to said  application,
said  invention  and said  Letters  Patent  and  legal  equivalents  in  foreign
countries as may be

                                       1
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known  and  accessible  to  Inventor  and  will  testify  as to the  same in any
interference or litigation related thereto and will promptly execute and deliver
to  Assignee or its legal  representative  any and all  papers,  instruments  or
affidavits  required to apply for,  obtain,  maintain,  issue and  enforce  said
application, said invention and said Letters Patent and said equivalents thereof
in any foreign  country  which may be  necessary  or  desirable to carry out the
purposes thereof.

     Inventor's  rights in the  above-mentioned  invention  or  improvement  and
Related Know-How and any patent  application(s)  and Letters Patent thereon have
not been previously assigned,  mortgaged or otherwise  encumbered,  and Inventor
has full  right,  power and  authority  to assign  all such  rights to  Assignee
hereunder.

     As used herein,  the terms  "Inventor"  and  "Assignee"  shall include such
parties and their  heirs,  administrators,  estates,  successors  and assigns of
every kind.

     Inventor  hereby  authorizes and requests the  Commissioner  of Patents and
Trademarks  of  the  United  States,  and  all  foreign  countries'   equivalent
officials,  to issue such Letters Patent as shall be granted on said application
or applications based thereon to Assignee.

     DATED this 25th day of January, 2000.

                                                          /s/  Garth W. Gobeli
                                                          Garth W. Gobeli

                                       2Exhibit 10.21

                    ASSIGNMENT OF INVENTION AND PATENT RIGHTS

Inventor:         Michael G. Harmon and Stephen L. Mills
Serial No.        09/788,054
Filing Date:      February 16, 2001

     For  valuable   consideration  received  or  to  be  received,  and  hereby
acknowledged, Michael G. Harmon of 6000 Cortaderia N.E., Albuquerque, New Mexico
87111, and Stephen L. Mills, 212 Richmond S.E.,  Albuquerque,  New Mexico 87106,
(hereinafter referred to as "Inventors"),  hereby sell, assign and transfer unto
Advanced  Optics   Electronics,   Inc.,  of  8301  Washington   N.E.,  Suite  4,
Albuquerque,  New Mexico 87113, its successors and assigns (hereinafter referred
to as "Assignee"),  the entire interest for the United States of America and all
foreign  countries,  including  all rights of priority  under the  international
conventions and treaties,  in and to a certain invention or improvement known as
LED Configuration for Large-Scale Display, and described in an application filed
in the United  States  Patent and  Trademark  Office on February  16,  2001,  as
Attorney Docket No.  30737-2-CIP,  and given U.S. Patent  Application Serial No.
09/788,054,  which claims  priority of U.S.  patent  application  serial  number
09/587,376,  filed June 1, 2000,  and in all Letters Patent of the United States
and all foreign  countries which may or shall be granted on said  invention,  or
any parts  thereof,  or on said  application,  or on any  provisional,  utility,
divisional,  continuing,  continuation-in-part,  reissue, reexamination or other
applications based in whole or in part thereon. And Inventors agree hereafter to
execute all applications,  amended  specifications,  deeds or other instruments,
and to do all acts necessary or proper in Assignee's  sole  discretion to secure
to Assignee  the grant of Letters  Patent in the United  States  and/or in other
countries as Assignee may determine in its sole discretion,  with specifications
and claims in such form as shall be approved by Assignee's counsel,  and to vest
and confirm in Assignee the legal and  equitable  title and full use and benefit
of all such  patents.

     Inventors  hereby  authorize  and request the  attorneys  of record in said
application  to insert in this  Assignment  the filing date and serial number of
said application when officially known.

     Inventors  further  agree with  Assignee  that this  Assignment  covers all
processes,  specifications,  procedures,  techniques  and  other  knowledge  and
information  now or  hereafter  known to  Inventors  which are not in the public
domain and which relate to the  above-mentioned  invention or  improvement,  its
manufacture,  uses or  embodiments,  or other matters (the "Related  Know-How").
Inventors  agree to disclose or provide  all Related  Know-How to Assignee  when
discovered or upon request.

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     Inventors  further  covenant  that  Assignee  will,  upon its  request,  be
provided  promptly  with all  pertinent  facts and  documents  relating  to said
application,  said  invention and said Letters  Patent and legal  equivalents in
foreign  countries as may be known and  accessible to Inventors and will testify
as to the  same in any  interference  or  litigation  related  thereto  and will
promptly execute and deliver to Assignee or its legal representative any and all
papers, instruments or affidavits required to apply for, obtain, maintain, issue
and enforce said  application,  said  invention and said Letters Patent and said
equivalents  thereof in any foreign  country which may be necessary or desirable
to carry out the purposes thereof.

     Inventors'  rights in the  above-mentioned  invention  or  improvement  and
Related Know-How and any patent  application(s)  and Letters Patent thereon have
not been previously assigned,  mortgaged or otherwise encumbered,  and Inventors
have full  right,  power and  authority  to assign all such  rights to  Assignee
hereunder.

     As used herein,  the terms  "Inventors"  and "Assignee"  shall include such
parties and their  heirs,  administrators,  estates,  successors  and assigns of
every kind.

     Inventors  hereby  authorize  and request the Director of the United States
Patent and Trademark Office, and all foreign countries' equivalent officials, to
issue  such  Letters  Patent  as  shall  be  granted  on  said   application  or
applications based thereon to Assignee.

     DATED this 15th day of December, 2000.

                                                           /s/ Michael G. Harmon
                                                           Michael G. Harmon

STATE OF NEW MEXICO        )
                           ) ss.
COUNTY OF BERNALILLO       )

     This instrument was acknowledged before me this 15th day of December, 2000,

by                            /s/ Adele L. Williams
                              ---------------------
                                  Notary Public
My commission expires:
4-7-03
-------
SEAL
----

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