Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 07/31/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,479,838        06/390,976        06/22/82        10/30/84       07/31/98
4,547,868        06/634,900        07/26/84        10/15/85       08/04/98
4,557,903        06/533,148        09/16/83        12/10/85       08/05/98
4,574,774        06/658,662        10/09/84        03/11/86       08/04/98
4,824,411        07/148,041        01/25/88        04/25/89       07/31/98
4,887,396        07/231,498        08/12/88        12/19/89       07/31/98
4,903,461        07/276,738        11/28/88        02/27/90       08/04/98
4,911,377        07/367,427        06/16/89        03/27/90       07/31/98
4,930,883        07/299,889        01/19/89        06/05/90       07/31/98
4,968,540        07/280,432        12/06/88        11/06/90       08/04/98
5,120,225        07/694,468        05/01/91        06/09/92       08/04/98
5,241,047        07/549,964        07/09/90        08/31/93       08/05/98
5,251,934        07/739,910        08/02/91        10/12/93       08/04/98
5,266,261        07/442,338        11/17/89        11/30/93       07/31/98
5,269,019        07/681,753        04/08/91        12/07/93       08/04/98