Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 01/14/00

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,625,875        06/697,795        02/04/85        12/02/86       01/19/00
4,676,790        06/779,808        09/25/85        06/30/87       01/20/00
4,983,393        07/257,156        10/14/88        01/08/91       01/14/00
5,002,273        07/389,938        08/07/89        03/26/91       01/14/00
5,016,415        07/439,846        11/21/89        05/21/91       01/14/00
5,017,299        07/226,604        08/01/88        05/21/91       01/20/00
5,019,771        07/527,661        05/21/90        05/28/91       01/14/00
5,029,992        07/224,437        07/26/88        07/09/91       01/14/00
5,031,647        07/431,101        11/03/89        07/16/91       01/14/00
5,037,717        07/275,629        11/16/88        08/06/91       01/20/00
5,275,463        07/884,767        05/18/92        01/04/94       01/19/00
5,279,234        07/956,354        10/05/92        01/18/94       01/19/00
5,296,459        07/902,224        06/19/92        03/22/94       01/19/00
5,321,428        07/940,688        09/04/92        06/14/94       01/20/00
5,326,481        07/943,682        09/11/92        07/05/94       01/20/00
5,335,433        08/000,709        01/05/93        08/09/94       01/20/00
5,374,706        08/136,430        10/13/93        12/20/94       01/14/00
5,380,982        08/098,174        07/23/93        01/10/95       01/18/00
5,383,869        07/960,176        10/08/92        01/24/95       01/14/00
5,398,087        08/272,309        07/08/94        03/14/95       01/18/00
5,405,533        08/044,277        04/07/93        04/11/95       01/20/00
5,441,686        08/169,333        12/17/93        08/15/95       01/18/00
5,444,649        08/074,794        06/10/93        08/22/95       01/20/00
5,446,553        07/913,331        07/15/92        08/29/95       01/19/00
5,458,086        08/136,215        10/13/93        10/17/95       01/20/00
5,462,559        08/260,380        06/14/94        10/31/95       01/19/00
5,462,562        08/179,987        01/11/94        10/31/95       01/20/00