Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 6/29/01

Patent          Serial          Filing          Issue           Granted
Number          Number          Date            Date            Date

4,686,009       06/792,548      10/29/85        08/11/87        06/29/01
4,793,814       06/887,260      07/21/86        12/27/88        07/05/01
4,809,359       06/945,822      12/24/86        02/28/89        07/03/01
4,812,072       07/166,854      03/11/88        03/14/89        06/29/01
4,812,639       06/810,808      12/19/85        03/14/89        06/29/01
4,859,492       07/099,697      09/21/87        08/22/89        06/29/01
4,902,065       07/313,907      02/23/89        02/20/90        07/02/01
5,022,620       07/381,055      07/17/89        06/11/91        06/29/01
5,172,228       07/794,516      11/19/91        12/15/92        07/05/01
5,179,529       07/706,561      05/28/91        01/12/93        06/29/01
5,179,612       07/810,656      12/19/91        01/12/93        06/29/01
5,185,087       07/687,556      04/19/91        02/09/93        07/03/01
5,208,644       07/526,558      05/18/90        05/04/93        07/03/01
5,415,666       08/027,505      03/04/93        05/16/95        07/03/01
5,427,762       08/209,605      03/09/94        06/27/95        07/05/01
5,434,981       08/047,884      04/15/93        07/18/95        07/03/01
5,469,734       08/357,133      12/15/94        11/28/95        07/05/01
5,475,906       08/304,559      09/12/94        12/19/95        07/03/01
5,479,497       08/237,970      05/04/94        12/26/95        07/02/01
5,533,350       08/357,928      12/16/94        07/09/96        07/03/01
5,603,279       08/422,893      04/17/95        02/18/97        07/05/01
5,613,532       08/412,816      03/29/95        03/25/97        07/02/01
5,620,524       08/395,613      02/27/95        04/15/97        07/03/01
5,625,142       08/500,544      07/11/95        04/29/97        07/03/01