Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 8/14/98

Patent           Serial            Filing          Issue           Granted
Number           Number            Date            Date            Date

Re. 34,676       08/116,315        09/03/93        07/26/94        08/18/98
4,483,032        06/436,048        10/22/82        11/20/84        08/18/98
4,739,692        06/866,743        05/27/86        04/26/88        08/17/98
4,817,679        07/040,160        04/17/87        04/04/89        08/19/98
4,840,233        07/155,516        02/12/88        06/20/89        08/19/98
4,879,181        07/040,534        04/20/87        11/07/89        08/19/98
4,893,696        07/222,117        07/20/88        01/16/90        08/14/98
5,049,591        07/413,770        09/28/89        09/17/91        08/20/98
5,113,864        07/188,043        04/29/88        05/19/92        08/14/98
5,219,162        07/894,558        06/15/92        06/15/93        08/18/98
5,239,835        07/871,548        04/21/92        08/31/93        08/19/98
5,261,866        07/746,905        08/19/91        11/16/93        08/20/98