NOTIFICATION OF ACCEPTANCE OF DELAYED PAYMENT OF MAINTENANCE FEE
                        (35 U.S.C. 41(c); 37 CFR 1.378)

   The patent(s) listed below are considered as not having expired but are
subject to the conditions set forth in 35 U.S.C. 41(c)(2), in view of the
Petition to Accept Late Payment of the maintenance fees which has been GRANTED
BY THE COMMISSIONER OF PATENTS AND TRADEMARKS, as provided for under 35 U.S.C.
41(c)(1) and 37 CFR 1.378.

                                                Application     Delayed Payment
Patent No.       Serial No.     Patent Date     Filing Date     Acceptance Date

4,337,541        06/223,935        07/06/82        01/09/81       05/25/95
4,491,578        06/516,937        01/01/85        07/25/83       04/05/95
4,580,412        06/780,643        04/08/86        09/26/85       03/30/95
4,596,458        06/570,521        06/24/86        01/13/84       05/24/95
4,643,970        06/469,004        02/17/87        02/23/83       05/23/95
4,762,558        07/050,914        08/09/88        05/15/87       04/26/95
4,783,089        06/760,141        11/08/88        07/29/85       03/20/95
4,905,465        07/350,346        03/06/90        05/08/89       05/31/95
4,937,856        07/057,091        06/26/90        06/01/87       05/30/95
4,945,563        07/247,844        07/31/90        09/22/88       03/31/95
4,957,392        07/344,079        09/18/90        04/27/89       04/10/95
4,964,604        07/456,462        10/23/90        12/26/89       05/26/95