Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 11/13/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,476,996        06/348,350        02/12/82        10/16/84       11/17/98
4,521,179        06/568,048        01/04/84        06/04/85       11/16/98
4,529,040        06/558,550        12/05/83        07/16/85       11/18/98
4,734,066        07/039,454        04/17/87        03/29/88       11/16/98
4,926,612        07/380,238        07/17/89        05/22/90       11/19/98
5,134,439        07/728,762        07/08/91        07/28/92       11/19/98
5,154,449        07/661,134        02/27/91        10/13/92       11/13/98
5,253,341        07/683,972        04/11/91        10/12/93       11/16/98
5,263,914        07/669,734        03/15/91        11/23/93       11/16/98
5,268,998        08/054,345        04/26/93        12/07/93       11/16/98
5,278,708        08/055,226        04/28/93        01/11/94       11/13/98