Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 08/13/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,627,445        06/720,906        04/08/85        12/09/86       08/19/99
4,634,471        06/728,236        04/29/85        01/06/87       08/16/99
4,807,353        07/174,300        03/28/88        02/28/89       08/19/99
4,817,931        07/005,422        01/20/87        04/04/89       08/13/99
4,866,560        07/185,587        04/22/88        09/12/89       08/19/99
4,867,376        06/920,237        10/17/86        09/19/89       08/19/99
4,957,830        07/334,361        04/07/89        09/18/90       08/19/99
4,960,438        07/357,942        05/30/89        10/02/90       08/16/99
4,962,777        06/736,645        05/21/85        10/16/90       08/17/99
4,968,265        07/374,622        06/29/89        11/06/90       08/18/99
5,015,571        07/039,534        04/16/87        05/14/91       08/18/99
5,052,436        07/498,039        03/23/90        10/01/91       08/19/99
5,179,823        07/882,756        05/11/92        01/19/93       08/18/99
5,258,539        07/968,654        10/30/92        11/02/93       08/17/99
5,284,294        07/891,559        05/29/92        02/08/94       08/18/99
5,315,647        07/738,342        07/31/91        05/24/94       08/19/99
5,318,676        07/901,752        06/22/92        06/07/94       08/17/99
5,332,681        07/897,630        06/12/92        07/26/94       08/16/99
5,338,415        07/901,753        06/22/92        08/16/94       08/17/99
5,339,051        08/039,638        03/30/93        08/16/94       08/19/99
5,351,523        08/006,401        01/21/93        10/04/94       08/16/99
5,374,396        07/878,740        05/05/92        12/20/94       08/16/99
5,374,936        08/202,504        02/28/94        12/20/94       08/19/99
5,384,438        08/161,295        12/02/93        01/24/95       08/19/99
5,389,550        08/146,109        11/10/93        02/14/95       08/17/99
5,392,953        08/071,712        06/03/93        02/28/95       08/17/99
5,399,158        08/009,599        01/27/93        03/21/95       08/17/99
5,412,999        08/023,110        02/26/93        05/09/95       08/19/99
5,430,514        08/161,808        12/06/93        07/04/95       08/17/99