Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 07/07/00

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,722,109        06/771,310        08/30/85        02/02/88       07/10/00
4,761,815        06/475,888        03/16/83        08/02/88       07/13/00
4,972,305        07/399,025        08/28/89        11/20/90       07/07/00
5,019,259        07/365,904        06/15/89        05/28/91       07/11/00
5,036,031        07/413,980        09/28/89        07/30/91       07/11/00
5,046,600        07/454,663        12/21/89        09/10/91       07/11/00
5,100,412        07/411,452        09/11/89        03/31/92       07/11/00
5,159,259        07/730,197        07/15/91        10/27/92       07/11/00
5,160,215        07/678,209        04/01/91        11/03/92       07/11/00
5,175,516        07/682,815        04/09/91        12/29/92       07/13/00
5,279,150        07/851,183        03/13/92        01/18/94       07/07/00
5,297,676        08/089,230        07/09/93        03/29/94       07/10/00
5,305,708        08/086,655        07/06/93        04/26/94       07/07/00
5,320,627        08/032,756        03/17/93        06/14/94       07/07/00
5,325,886        08/042,670        04/05/93        07/05/94       07/10/00
5,341,933        08/016,944        02/12/93        08/30/94       07/07/00
5,359,263        07/979,765        11/20/92        10/25/94       07/07/00
5,388,339        07/760,686        09/16/91        02/14/95       07/13/00
5,399,447        08/163,205        12/06/93        03/21/95       07/12/00
5,406,419        08/132,757        10/06/93        04/11/95       07/07/00
5,413,588        07/847,718        03/06/92        05/09/95       07/07/00
5,422,742        08/116,799        09/08/93        06/06/95       07/12/00
5,431,410        08/283,523        08/01/94        07/11/95       07/13/00
5,442,988        08/320,358        10/11/94        08/22/95       07/12/00
5,467,885        08/158,755        11/29/93        11/21/95       07/10/00
5,471,982        07/951,728        09/29/92        12/05/95       07/07/00
5,484,893        08/078,650        06/21/93        01/16/96       07/12/00
5,486,826        08/246,014        05/19/94        01/23/96       07/13/00
5,493,890        08/213,988        03/16/94        02/27/96       07/07/00
5,503,668        08/278,668        07/21/94        04/02/96       07/13/00
5,504,694        08/141,368        10/28/93        04/02/96       07/12/00
5,534,257        08/090,148        11/08/93        07/09/96       07/13/00