Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 03/09/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,637,289       06/667,583      11/02/84        01/20/87        03/15/01
4,712,413       06/909,554      09/22/86        12/15/87        03/15/01
4,740,614       07/016,745      02/19/87        04/26/88        03/09/01
4,796,287       06/781,020      09/27/85        01/03/89        03/12/01
5,034,331       06/763,530      08/08/85        07/23/91        03/09/01
5,068,938       07/581,899      09/13/90        12/03/91        03/14/01
5,098,672       07/362,028      06/06/89        03/24/92        03/15/01
5,120,842       07/678,380      04/01/91        06/09/92        03/15/01
5,124,152       07,638,292      01/07/91        06/23/92        03/12/01
5,132,232       07/072,424      07/13/87        07/21/92        03/12/01
5,135,535       07/713,973      06/11/91        08/04/92        03/15/01
5,137,691       07/361,987      06/05/89        08/11/92        03/14/01
5,155,652       07/694,698      05/02/91        10/13/92        03/09/01
5,166,929       07/539,832      06/18/90        11/24/92        03/09/01
5,173,800       07/772,432      10/07/91        12/22/92        03/12/01
5,304,330       07/748,032      08/21/91        04/19/94        03/12/01
5,441,749       08/160,029      11/30/93        08/15/95        03/15/01
5,535,784       08/269,191      06/30/94        07/16/96        03/12/01
5,538,817       08/261,488      06/17/94        07/23/96        03/15/01
5,543,166       08/247,109      05/20/94        08/06/96        03/12/01
5,554,092       08/253,710      06/03/94        09/10/96        03/15/01
5,556,576       08/532,536      09/22/95        09/17/96        03/09/01
5,558,046       08/295,693      08/30/94        09/24/96        03/09/01
5,562,703       08/259,712      06/14/94        10/08/96        03/15/01
5,567,086       08/370,766      12/23/94        10/22/96        03/15/01
5,567,174       08/253,150      06/02/94        10/22/96        03/15/01
5,580,078       08/151,344      11/12/93        12/03/96        03/13/01
5,588,578       08/300,710      09/02/94        12/31/96        03/15/01
5,591,722       08/354,313      12/12/94        01/07/97        03/12/01
5,593,089       08/542,991      10/13/95        01/14/97        03/09/01
5,595,226       08/274,825      07/14/94        01/21/97        03/12/01
5,598,947       08/377,449      01/24/95        02/04/97        03/13/01