Errata In the list of patents which expired on December 15, 1995, due to failure to pay maintenance fees, in the O.G. of February 20, 1996, the following patent should not have appeared: Patent Number Serial Number Filing Date Issue Date 4,712,709 06/856,172 04/28/86 12/15/87 Errata In the list of patents which expired on May 18, 1995 due to failure to pay maintenance fees, in the O.G. of August 01, 1995, the following patent should not have appeared: Patent Number Serial Number Filing Date Issue Date 4,665,955 06/825,575 02/04/86 05/19/87