Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 6/01/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,706,676       06/660,778      02/11/85        11/17/87        06/06/01
4,737,950       06/739,941      05/31/85        04/12/88        06/01/01
4,813,113       07/133,798      12/16/87        03/21/89        06/01/01
4,818,937       07/162,750      03/01/88        04/04/89        06/01/01
5,069,936       07/390,628      08/07/89        12/03/91        06/01/01
5,102,337       07/465,312      01/16/90        04/07/92        06/06/01
5,157,030       07/398,413      08/25/89        10/20/92        06/01/01
5,199,839       07/773,516      10/09/91        04/06/93        06/01/01
5,416,529       08/182,284      01/14/94        05/16/95        06/01/01
5,441,750       08/295,622      08/24/94        08/15/95        06/01/01
5,517,768       08/251,985      05/31/94        05/21/96        06/01/01
5,542,721       08/386,564      02/10/95        08/06/96        06/01/01
5,555,126       08/420,195      04/10/95        09/10/96        06/07/01
5,568,330       08/312,803      09/27/94        10/22/96        06/06/01
5,588,422       07/977,498      11/17/92        12/31/96        06/01/01
5,604,346       08/343,471      01/17/95        02/18/97        06/01/01
5,613,578       08/170,950      12/21/93        03/25/97        06/01/01