Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 02/25/00

Patent           Serial            Filing          Issue           Granted
Number           Number            Date            Date            Date

4,569,279        06/714,162        03/19/85        02/11/86        03/02/00
5,007,835        07/394,906        08/17/89        04/16/91        02/29/00
5,033,953        07/515,075        04/26/90        07/23/91        03/02/00
5,047,845        07/594,507        10/09/90        09/10/91        02/28/91
5,299,947        07/511,353        04/18/90        04/05/94        03/01/00
5,334,522        07/860,233        03/27/92        08/02/94        02/28/00
5,354,523        07/922,683        07/29/92        10/11/94        03/01/00
5,359,739        08/113,076        08/30/93        11/01/94        02/28/00
5,418,674        08/095,573        07/19/93        05/23/95        02/28/00
5,421,276        07/990,466        12/15/92        06/06/95        03/02/00
5,428,668        08/148,828        11/04/93        06/27/95        02/29/00
5,432,466        08/220,480        03/31/94        07/11/95        02/28/00
5,450,519        08/236,823        05/02/94        09/12/95        02/28/00
5,464,928        08/299,385        09/01/94        11/07/95        02/28/00