Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 01/19/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

Re 34,578       07/914,297      07/16/92        04/05/94        01/23/01
4,718,409       06/919,634      10/16/86        01/12/88        01/23/01
4,754,899       07/010,464      02/03/87        07/05/88        01/19/01
4,773,572       06/885,280      07/14/86        09/27/88        01/19/01
4,986,515       07/506,695      04/09/90        01/22/91        01/19/01
4,986,791       07/466,196      01/17/90        01/22/91        01/22/01
4,998,732       07/436,681      11/15/89        03/12/91        01/24/01
5,071,017       07/655,830      02/15/91        12/10/91        01/24/01
5,072,426       07/652,671      02/08/91        12/10/91        01/19/01
5,072,863       07/496,937      03/21/90        12/17/91        01/25/01
5,090,598       07/527,363      05/23/90        02/25/92        01/19/01
5,095,194       07/420,816      10/12/89        03/10/92        01/22/01
5,099,571       07/695,465      05/03/91        03/31/92        01/25/01
5,112,350       07/657,000      02/15/91        05/12/92        01/19/01
5,127,553       07/583,951      09/17/90        07/07/92        01/19/01
5,414,478       08/124,855      09/22/93        05/09/95        01/22/01
5,440,814       08/201,767      02/25/94        08/15/95        01/22/01
5,517,194       08/194,616      02/10/94        05/14/96        01/24/01
5,521,602       08/194,723      02/10/94        05/28/96        01/24/01
5,545,889       08/163,580      12/07/93        08/13/96        01/24/01
5,548,277       08/203,170      02/28/94        08/20/96        01/24/01
5,549,469       08/374,164      01/17/95        08/27/96        01/24/01
5,560,548       08/333,849      11/03/94        10/01/96        01/19/01
5,579,780       08/321,554      10/11/94        12/03/96        01/19/01
5,582,798       08/394,256      02/23/95        12/10/96        01/22/01