Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 05/04/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,657,696       06/776,616      09/16/85        04/14/87        05/10/01
4,685,047       06/886,138      07/16/86        08/04/87        05/10/01
4,690,055       06/901,238      08/28/86        09/01/87        05/10/01
4,771,929       07/017,327      02/20/87        09/20/88        05/08/01
4,806,740       06/909,145      09/19/86        02/21/89        05/09/01
4,815,168       07/117,747      11/04/87        03/28/89        05/09/01
4,862,604       07/237,889      08/29/88        09/05/89        05/09/01
4,911,451       07/330,383      03/29/89        03/27/90        05/10/01
4,934,638       07/341,739      04/21/89        06/19/90        05/04/01
5,044,947       07/546,559      06/29/90        09/03/91        05/04/01
5,136,579       07/590,897      10/01/90        08/04/92        05/08/01
5,187,735       07/517,665      05/01/90        02/16/93        05/08/01
5,335,310       08/000,679      01/05/93        08/02/94        05/10/01
5,404,935       07/987,635      12/09/92        04/11/95        05/07/01
5,465,023       08/089,064      07/01/93        11/07/95        05/09/01
5,524,444       08/357,930      12/16/94        06/11/96        05/08/01
5,542,328       08/399,737      03/07/95        08/06/96        05/08/01
5,548,517       08/113,286      08/27/93        08/20/96        05/08/01
5,570,265       08/376,086      01/20/95        10/29/96        05/09/01
5,571,955       08/418,015      04/06/95        11/05/96        05/09/01
5,578,889       08/388,558      02/14/95        11/26/96        05/09/01
5,579,528       08/416,550      04/03/95        11/26/96        05/08/01
5,587,940       08/152,423      11/12/93        12/24/96        05/08/01
5,598,422       08/531,572      09/07/95        01/28/97        05/08/01
5,606,286       08/508,163      07/27/95        02/25/97        05/07/01
5,611,712       08/262,312      06/17/94        03/18/97        05/08/01
5,618,848       08/435,974      05/05/95        04/08/97        05/09/01
5,623,284       08/423,686      04/18/95        04/22/97        05/10/01