Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 9/28/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,834,200       07/132,323      12/14/87        05/30/89        10/02/01
4,963,140       07/134,275      12/17/87        10/16/90        09/28/01
5,160,029       07/614,903      11/16/90        11/03/92        10/01/01
5,190,111       07/709,237      06/03/91        03/02/93        09/28/01
5,219,184       07/967,736      10/27/92        06/15/93        10/01/01
5,225,102       07/822,459      01/13/92        07/06/93        10/02/01
5,227,385       07/850,624      03/13/92        07/13/93        10/02/01
5,227,391       07/866,596      04/10/92        07/13/93        10/02/01
5,235,796       07/856,083      03/19/92        08/17/93        10/01/01
5,255,931       07/919,326      07/27/92        10/26/93        09/28/01
5,265,018       07/710,360      06/03/91        11/23/93        09/28/01
5,299,821       08/061,542      05/17/93        04/05/94        09/28/01
5,312,123       07/974,640      11/12/92        05/17/94        09/28/01
5,312,124       07/974,652      11/12/92        05/17/94        09/28/01
5,555,599       08/574,343      12/18/95        09/17/96        10/02/01
5,583,485       08/461,653      06/05/95        12/10/96        10/02/01
5,586,760       08/510,357      08/02/95        12/24/96        10/02/01
5,599,093       08/320,007      10/07/94        02/04/97        10/02/01
5,603,724       08/387,312      02/13/95        02/18/97        10/02/01
5,633,459       08/608,677      02/29/96        05/27/97        10/02/01
5,638,410       08/136,339      10/14/93        06/10/97        10/02/01