United States Patent and Trademark Office OG Notices: 21 May 2002

                 Patents Reinstated Due to the Acceptance of a
                     Late Maintenance Fee From 04/15/2002

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,898,577       07/250,709      09/28/88        02/06/90        04/19/02
5,144,144       07/732,623      07/19/91        09/01/92        04/19/02
5,144,939       07/709,315      06/03/91        09/08/92        04/19/02
5,187,214       07/729,274      07/12/91        02/16/93        04/19/02
5,267,382       07/939,905      09/04/92        12/07/93        04/19/02
5,318,784       07/942,261      09/09/92        06/07/94        04/17/02
5,543,797       08/234,477      04/28/94        08/06/96        04/16/02
5,572,743       08/255,095      06/07/94        11/12/96        04/16/02
5,607,351       08/337,666      11/10/94        03/04/97        04/18/02
5,617,245       08/129,194      10/27/95        04/01/97        04/16/02
5,627,720       08/514,191      08/11/95        05/06/97        04/16/02
5,679,477       08/754,094      11/20/96        10/21/97        04/16/02
5,681,159       08/625,926      04/01/96        10/28/97        04/16/02
5,693,620       08/355,276      12/12/94        12/02/97        04/16/02
5,696,411       08/530,925      09/20/95        12/09/97        04/16/02
5,711,362       08/564,517      11/29/95        01/27/98        04/16/02
5,713,103       08/637,522      04/25/96        02/03/98        04/16/02
5,720,407       08/636,551      04/23/96        02/24/98        04/17/02
5,723,392       08/264,330      06/23/94        03/03/98        04/16/02
RE. 36,253      07/665,031      03/06/91        07/13/99        04/16/02