Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 9/12/97


Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,511,378        06/482,810        04/07/83        04/16/85       09/16/97
4,734,769        06/745,441        06/17/85        03/29/88       09/18/97
4,798,184        06/931,536        11/17/86        01/17/89       09/12/97
4,823,306        07/085,110        08/14/87        04/18/89       09/15/97
4,834,103        07/150,519        02/09/88        05/30/89       09/15/97
4,885,263        07/029,184        03/23/87        12/05/89       09/17/97
4,892,347        07/202,189        06/02/88        01/09/90       09/15/97
4,993,675        07/438,613        11/17/89        02/19/91       09/15/97
5,027,799        07/598,651        10/18/90        07/02/91       09/12/97
5,044,001        07/541,261        06/20/90        08/27/91       09/16/97
5,124,186        07/567,393        08/14/90        06/23/92       09/12/97
5,128,507        06/575,499        01/30/84        07/07/92       09/18/97
5,135,455        07/680,059        04/30/91        08/04/92       09/15/97
5,150,934        07/707,698        05/30/91        09/29/92       09/18/97
5,163,204        07/669,354        03/14/91        11/17/92       09/15/97
5,174,965        07/679,267        04/02/91        12/29/92       09/15/97
5,180,162        07/766,056        09/26/91        01/19/93       09/16/97
5,181,159        07/855,111        03/11/92        01/19/93       09/15/97
5,191,904        07/746,746        08/19/91        03/09/93       09/16/97
5,194,461        07/721,153        06/26/91        03/16/93       09/16/97
5,201,597        07/679,201        04/02/91        04/13/93       09/15/97
5,203,087        07/895,647        06/09/92        04/20/93       09/12/97
5,207,338        07/847,605        03/04/92        05/04/93       09/15/97
5,215,805        07/728,556        07/11/91        06/01/93       09/15/97
5,234,659        07/776,309        11/15/91        08/10/93       09/15/97