Amended and Restated Patent Rights

                         Assignment/Consulting Agreement


         This Amended and Restated Rights  Assignment/Consulting  Agreement (the
"Agreement")  is made as of the 29th  day of  March,  1995,  between  Joseph  F.
Stratton,  an individual  ("Licensor") and InteroAct  Systems,  Incorporated,  a
North Carolina corporation ("Licensee").

         WHEREAS,  Licensor owns not less than  forty-five  percent (45%) of the
Inventions (as defined below);

         WHEREAS,  Licensor  and  Licensee  are  parties to that  Patent  Rights
Assignment/Consulting   Agreement   dated   December  20,  1993  (the  "Original
Agreement");

         WHEREAS,  the parties  both  desire to amend and  restate the  Original
Agreement  and have  agreed to enter into this  Agreement  to  evidence  certain
changes in their  agreement  with  respect  to  Licensee's  licensing  of all of
Licensor's interest in the Inventions;

         WHEREAS, this Agreement constitutes an amendment and restatement of the
original Agreement;

         NOW,  THEREFORE,  in consideration of the mutual covenants and premises
hereinafter  set  forth,  and for other  good and  valuable  consideration,  the
receipt of which is hereby acknowledged, the parties agree as follows:

         1.       DEFINITIONS.  For purposes hereof:

                  (a)  "Inventions"  shall mean U.S. Patent Number 4,554,446 and
U.S. Patent Number  4,672,377,  and any and all foreign patent  applications and
patents  corresponding  to  these  U.S.  Patents  and any  domestic  or  foreign
improvement applications or patents relating thereto in which Licensor is listed
as an inventor or in which he has or hereafter acquires any interest.

                  (b)  "Licensed  Products"  shall mean any apparatus or process
which is covered by any claim contained in any of the  applications or unexpired
patents included in the Inventions.

         2.       GRANT OF LICENSE.  With respect to his  interest in the  
Inventions, Licensor hereby grants to Licensee an exclusive  license under the 
claims of the Inventions  to  manufacture,  have  manufactured,  use,  and sell
the  Licensed Products throughout the world and the exclusive right to
sublicense others under the claims of the Inventions to manufacture,  have  
manufactured,  use, and sell the Licensed  Products  throughout the world.  This
grant is to the exclusion of all others, including the Licensor.

         3.  ROYALTY  PAYMENTS.  As  compensation  for the grant of  license  by
Licensor



to Licensee under  paragraph 2 hereof,  Licensee will pay to Licensor a
royalty of .8% of the gross collected  revenues derived from the business of the
Licensee,  only as such business pertains to the licensed Inventions,  until the
Licensee  shall have paid to Licensor the  aggregate  sum of $600,000,  at which
time the license granted to Licensee under paragraph 2 hereof shall continue for
the term provided under  paragraph 6 hereof but no additional  royalty  payments
will be due to Licensor  from  Licensee.  A minimum  royalty of $3,000 per month
will be paid by Licensee to Licensor, one-half payable on the 15th of each month
and one-half  payable on the last day of each month,  commencing March 31, 1995,
and continuing until the earlier to occur of (i) payment to Licensor by Licensee
of an  aggregate  of  $600,000  in  royalties  hereunder  or (ii) the license by
Licensor to Licensee  under  paragraph 2 hereof no longer  being in effect,  for
whatever  reason.  Any royalties due to Licensor under this  Agreement  shall be
payable  by check  mailed  to  Licensor  at the  following  address:  Joseph  F.
Stratton, 845 NW Tenth Street, Corvallis, Oregon 97330, or such other address as
Licensor requests in writing delivered to Licensee at least thirty days prior to
the effective date of such change.

         4.       PROTECTION OF INVENTIONS.

                  (a)  Licensor  shall  file  or  cause  to be  filed  with  and
prosecuted  before the United  States  Patent and  Trademark  Office such patent
applications  as requested by Licensee to protect the rights granted to Licensee
for the Inventions pursuant to this Agreement.

                  (b) Licensee may file or cause to be filed with and prosecuted
before  foreign  patent  offices  at  its  own  expense,   such  patent  foreign
applications as, in its sole discretion,  it shall deem necessary to protect the
rights  granted to Licensee for the  Inventions  pursuant to this  Agreement and
Licensor shall cooperate therewith as requested by Licensee.

                  (c) Licensee may bring any action for patent  infringement  of
the Licensed  Products during the term of this Agreement,  in Licensee's name or
jointly  with  Licensor,  as it shall deem  necessary  and proper to protect the
patent rights to the Licensed Products and Licensor shall cooperate therewith as
requested by Licensee.

         5. WARRANTIES.  Licensor  warrants and represents to Licensee that: (i)
he is the owner of forty-five percent (45%) of the right, title, and interest in
the Inventions;  (ii) that as of the date hereof he has received payment in full
of  any  amounts  owed  to him by  Licensor  under  the  Original  Agreement  or
otherwise;  (iii) no breaches or defaults  exist under the  Original  Agreement;
(iv) no rights of a third party (including  patent rights) would be infringed by
Licensee's  manufacture,  use,  or  sale of any  apparatus  or  method  licensed
hereunder; and (v) none of his interests in the Inventions have been transferred
or assigned to any person or entity except as provided  herein.  Licensor  shall
indemnify  and defend  Licensee  against  any  liabilities,  damages,  costs and
expenses,  including reasonable  attorneys' fees and court costs, which Licensee
shall or may incur or suffer  which  arise out of or relate to the breach of any
violation  of a warranty of Licensee set forth in this  paragraph 5;  excluding,
however,  any costs or expenses  incurred by Licensee  with respect to any legal
action filed by Licensee against Licensor prior to the date hereof.


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         6. TERM. This Agreement shall continue in full force and effect as long
as any patent  application  for any  Invention  is pending  in any  domestic  or
foreign  patent  office  or until  the  expiration  of the last to expire of any
patent included in the Inventions.  In no event shall the term of this Agreement
extend longer than the term of the last to expire,  issued  patent  covering the
Licensed Products.

         7.       TERMINATION.

                  (a) Paragraph 6 above notwithstanding, if Licensee defaults by
failing to make payments to Licensor as herein  provided for any period of sixty
(60) days, this Agreement and the license granted hereunder shall terminate upon
15 days prior written notice by Licensor to Licensee of such termination, during
which period, Licensee may cure said payment default.

                  (b) In the event that either of the patents for the Inventions
is found to be  invalid  for any  reason,  then  Licensee  shall be  immediately
released from all of its obligations under this Agreement.  Further, Licensee is
expressly permitted to continue in the operation of its business after such time
without incurring any financial  obligation to the Licensor under this Agreement
whatsoever.

         8.       GENERAL PROVISIONS.

                  (a) This  Agreement  embodies  all of the  understandings  and
obligations  between the parties with respect to the subject matter hereof.  The
terms of this  Agreement may be modified only by the mutual  written  consent of
each party.

                  (b) No  waiver of a breach  of any term or  provision  of this
Agreement  shall be  construed or operate as a waiver of any other breach of the
terms or provisions of this Agreement.

                  (c) This  Agreement  shall be  binding  upon and  inure to the
benefit of the parties hereto and their respective  successors,  assigns,  heirs
and legal representatives.

                  (d)  This  Agreement   shall  be  governed  and  construed  in
accordance with the internal laws of the State of North Carolina, without regard
to conflict of law  principles,  and the parties consent to jurisdiction in said
state.

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         IN WITNESS WHEREOF,  the parties hereto have agreed and set their hands
by proper persons duly authorized to become  effective upon the date first above
written.

                                    LICENSEE:
                                    InteroAct Systems, Incorporated

                                    By: /s/ WILLIAM F. PENWELL
                                    Title:      President & CEO

                                    LICENSOR:

                                    /s/ JOSEPH F. STRATTON       (SEAL)
                                    Joseph F. Stratton

 

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