Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 08/07/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,511,630        06/581,053        02/17/84        04/16/85       08/13/98
4,560,239        06/584,772        02/29/84        12/24/85       08/13/98
4,732,391        06/779,166        09/23/85        03/22/88       08/11/98
4,887,700        07/223,357        07/25/88        12/19/89       08/11/98
5,219,964        07/925,845        08/07/92        06/15/93       08/12/98
5,235,074        07/847,138        03/06/92        08/10/93       08/12/98
5,255,207        07/900,560        06/18/92        10/19/93       08/13/98
5,269,237        07/844,442        03/02/92        12/14/93       08/11/98
5,287,272        07/420,105        10/11/89        02/15/94       08/12/98