Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 06/23/00

Patent           Serial            Filing          Issue           Granted
Number           Number            Date            Date            Date

4,715,545        06/828,788        02/13/86        12/29/87        06/27/00
4,721,833        06/798,732        11/15/85        01/26/88        06/28/00
4,732,033        06/912,332        09/26/86        03/22/88        06/28/00
4,763,352        07/125,159        11/25/87        08/09/88        06/29/00
4,984,056        07/300,308        01/23/89        08/14/90        06/28/00
5,003,954        07/411,397        09/22/89        04/02/91        06/26/00
5,049,020        07/517,567        05/01/90        09/17/91        06/28/00
5,056,262        07/610,073        11/07/90        10/15/91        06/29/00
5,092,864        07/516,661        04/30/90        03/03/92        06/29/00
5,111,230        07/574,284        08/28/90        05/05/92        06/28/00
5,129,828        07/685,284        04/15/91        07/14/92        06/27/00
5,210,374        07/526,408        05/21/90        05/11/93        06/27/00
5,307,394        08/009,976        01/27/93        04/26/94        06/27/00
5,320,258        07/697,826        05/09/91        06/14/94        06/29/00
5,442,139        08/127,184        09/27/93        08/15/95        06/29/00
5,484,244        08/192,696        02/07/94        01/16/96        06/29/00