Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 9/04/98
   
Patent           Serial            Filing          Issue           Granted
Number           Number            Date            Date            Date

Re. 35,545       08/257,940        06/10/94        07/01/97        09/08/98
4,538,245        06/367,331        04/12/82        08/27/85        09/09/98
4,541,012        06/336,984        01/04/82        09/10/85        09/10/98
4,618,289        06/599,727        05/22/84        10/21/86        09/09/98
4,735,828        06/889,005        07/24/86        04/05/88        09/09/98
4,801,300        07/137,392        12/23/87        01/31/89        09/09/98
4,850,910        07/055,733        05/29/87        07/25/89        09/09/98
4,852,874        07/229,220        08/05/88        08/01/89        09/09/98
4,905,567        07/313,910        02/23/89        03/06/90        09/10/98
4,919,998        07/407,705        09/14/89        04/24/90        09/09/98
5,106,153        07/609,361        11/05/90        04/21/92        09/04/98
5,116,538        07/445,362        12/04/89        05/26/92        09/08/98
5,137,754        07/520,287        05/07/90        08/11/92        09/08/98
5,189,012        07/535,110        06/08/90        02/23/93        09/08/98
5,211,247        07/719,162        06/21/91        05/18/93        09/04/98
5,226,576        07/789,742        11/08/91        07/13/93        09/10/98
5,268,906        08/002,534        01/07/93        12/07/93        09/08/98
5,274,696        07/680,952        04/05/91        12/28/93        09/09/98