Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 12/11/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

5,128,256        07/341,261        04/20/89        07/07/92       12/17/98
5,270,370        07/948,016        09/21/92        12/14/93       12/16/98
5,299,400        07/949,983        09/24/92        04/05/94       12/14/98
5,308,587        07/956,298        10/05/92        05/03/94       12/14/98
5,310,096        07/961,778        10/15/92        05/10/94       12/17/98
5,316,119        07/766,750        09/27/91        05/31/94       12/17/98