Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 09/03/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

Re. 35,812       07/845,603        03/04/92        06/02/98       09/07/99
4,751,115        06/927,398        11/06/86        06/14/88       09/08/99
4,871,451        07/246,434        09/19/88        10/03/89       09/07/99
4,881,040        07/228,158        08/04/88        11/14/89       09/09/99
5,913,022        07/283,720        12/13/88        04/03/90       09/08/99
4,920,721        07/305,738        02/02/89        05/01/90       09/07/99
4,921,048        07/247,760        09/22/88        05/01/90       09/07/99
4,952,211        07/242,639        09/12/88        08/28/90       09/07/99
4,967,262        07/432,598        11/06/89        10/30/90       09/08/99
5,193,696        07/786,087        10/31/91        03/16/93       09/08/99
5,310,284        07/908,276        07/02/92        05/10/94       09/07/99
5,310,370        08/058,782        05/07/93        05/10/94       09/07/99
5,318,397        07/879,342        05/07/92        06/07/94       09/09/99
5,320,179        07/925,100        08/06/92        06/14/94       09/07/99
5,324,400        07/986,846        12/04/92        06/28/94       09/07/99
5,327,248        07/857,037        03/23/92        07/05/94       09/08/99
5,330,165        07/890,386        05/26/92        07/19/94       09/07/99
5,337,934        07/900,615        06/18/92        08/16/94       09/07/99
5,352,201        08/191,429        02/03/94        10/04/94       09/07/99
5,399,555        07/947,090        09/17/92        03/21/95       09/09/99
5,405,953        08/100,979        08/03/93        04/11/95       09/09/99
5,414,079        08/101,184        08/03/93        05/09/95       09/09/99
5,424,471        08/099,298        07/29/93        06/13/95       09/07/99
5,433,411        07/955,904        10/04/93        07/18/95       09/07/99