Errata

In the list of patents which expired on Dec. 21, 1994, due to failure to
pay maintenance fees, in the O.G. of Feb. 28, 1995, the following patent
should not have appeared:

Patent No.      Serial No.              Issue Date      Filing Date

4,365,066       06/253,932              12/21/82        11/25/80

                                    Errata


In the list of patents which expired on Mar. 24, 1995, due to failure to
pay maintenance fees, in the O.G. of Jun. 06, 1995, the following patent
should not have appeared:

Patent No.      Serial No.              Issue Date      Filing Date

4,651,588       06/835,273              03/24/87        03/03/86

                                    Errata

In the list of patents which expired on Dec. 11, 1994 and July 03, 1994,
due to failure to pay maintenance fees, in the O.G. of Apr. 11, 1995,
the following patent should not have appeared:

Patent No.      Serial No.              Issue Date      Filing Date

4,977,011       07/245,492              12/11/90        09/19/88
4,938,821       07/089,197              07/03/90        08/24/87

In the list of patents which expired on Feb. 13, 1995, due to failure to
pay maintenance fees, in the O.G. of Apr. 25, 1995, the following patent
should not have appeared:

Patent No.      Serial No.              Issue Date      Filing Date

4,991,328       07/344,874              02/12/91        04/28/89