Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 01/29/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,521,262        06/439,333        01/10/83        06/04/85       02/02/99
4,541,810        06/546,659        10/28/83        09/17/85       02/03/99
4,706,345        06/911,963        09/25/86        11/17/87       02/03/99
4,890,275        07/183,626        04/08/88        12/26/89       01/29/99
5,191,235        07/827,000        01/28/92        03/02/93       02/01/99
5,216,434        07/869,104        04/14/92        06/01/93       02/01/99
5,218,355        07/603,230        10/25/90        06/08/93       02/01/99
5,221,169        07/727,580        07/09/91        06/22/93       02/04/99
5,239,491        07/743,928        08/12/91        08/24/93       02/01/99
5,280,664        07/855,992        03/20/92        01/25/94       02/01/99
5,299,824        07/964,100        10/21/92        04/05/94       02/04/99
5,316,594        07/763,339        09/20/91        05/31/94       02/01/99
5,316,671        08/006,967        01/21/93        05/31/94       02/01/99
5,316,779        07/760,704        09/16/91        05/31/94       02/01/99
5,327,590        07/913,796        07/16/92        07/12/94       02/01/99
5,329,859        08/089,344        07/12/93        07/19/94       01/29/99
5,331,434        07/967,408        10/27/92        07/19/94       02/01/99
5,343,672        07/985,040        12/01/92        09/06/94       02/01/99
5,357,998        07/983,540        02/19/93        10/25/94       02/01/99