Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 12/31/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,651,431        06/735,373        05/17/85        03/24/87       01/03/00
4,914,556        07/224,436        07/26/88        04/03/90       01/03/00
4,927,141        07/383,607        07/24/89        05/22/90       01/04/00
4,963,995        07/289,776        12/27/88        10/16/90       01/06/00
4,976,528        07/311,860        02/17/89        12/11/90       01/04/00
4,976,732        06/649,909        09/12/84        12/11/90       01/06/00
5,005,061        07/474,889        02/05/90        04/02/91       01/03/00
5,005,069        07/516,656        04/30/90        04/02/91       01/03/00
5,008,736        07/438,382        11/20/89        04/16/91       01/03/00
5,018,949        07/473,162        01/31/90        05/28/91       01/06/00
5,028,010        07/452,223        12/18/89        07/02/91       01/04/00
5,032,400        07/430,353        11/02/89        07/16/91       01/05/00
5,173,651        07/220,070        07/15/88        12/22/92       01/06/00
5,242,565        07/727,877        07/10/91        09/07/93       01/04/00
5,256,411        07/720,591        06/28/91        10/26/93       01/04/00
5,263,866        07/939,660        09/03/92        11/23/93       01/03/00
5,274,573        07/681,228        04/05/91        12/28/93       01/04/00
5,314,323        07/944,892        09/09/92        05/24/94       01/04/00
5,321,403        08/048,537        04/14/93        06/14/94       01/04/00
5,321,978        08/043,121        04/05/93        06/21/94       01/04/00
5,324,479        07/383,032        07/21/89        06/28/94       01/03/00
5,348,571        08/001,791        01/08/93        09/20/94       01/03/00
5,370,039        08/035,734        03/23/93        12/06/94       01/04/00
5,389,767        08/002,154        01/11/93        02/14/95       01/04/00
5,398,947        08/165,200        12/13/93        03/21/95       01/03/00
5,406,070        08/168,700        12/16/93        04/11/95       01/04/00
5,408,138        08/130,892        10/04/93        04/18/95       01/03/00
5,420,697        08/020,368        02/22/93        05/30/95       01/03/00
5,431,112        08/220,749        03/31/94        07/11/95       01/04/00
5,437,875        08/295,661        08/24/94        08/01/95       01/03/00
5,440,238        07/948,535        09/21/92        08/08/95       01/05/00
5,452,266        08/308,336        09/19/94        09/19/95       01/03/00
5,454,331        08/165,260        12/10/93        10/03/95       01/04/00
5,455,573        08/358,704        12/19/94        10/03/95       01/04/00
5,458,274        08/196,697        02/15/94        10/17/95       01/05/00