Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 01/12/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,614,312       06/642,398      08/20/84        09/30/86        01/18/01
4,702,551       06/659,580      10/11/84        10/27/87        01/18/01
4,710,384       06,889,775      07/28/86        12/01/87        01/16/01
4,768,186       06/828,293      02/11/86        08/30/88        01/16/01
4,772,616       07/094,968      09/09/87        09/20/88        01/12/01
5,016,338       07/326,393      03/20/89        05/21/91        01/18/01                       /18/01
5,039,426       07/395,999      08/21/89        08/13/91        01/18/01
5,131,901       07/723,574      07/01/91        07/21/92        01/16/01
5,378,929       08/075,961      06/14/93        01/03/95        01/17/01
5,415,532       08/159,906      11/30/93        05/16/95        01/16/01
5,445,433       08/116,240      09/01/93        08/29/95        01/17/01
5,490,211       08/230,191      04/20/94        02/06/96        01/16/01
5,499,029       08/234,441      04/28/94        03/12/96        01/16/01
5,533,061       08/194,694      02/10/94        07/02/96        01/16/01
5,555,213       08/496,700      06/29/95        09/10/96        01/16/01
5,555,297       08/443,500      05/18/95        09/10/96        01/16/01
5,586,178       08/315,047      09/29/94        12/17/96        01/16/01