Errata In the list of patents which expired on March 13, 1996, due to failure to pay maintenance fees, in the O.G. of May 21, 1996, the following patent should not have appeared: Patent Number Serial Number Issue Date Filing Date Re. 32,471 06/693,879 08/11/87 01/23/85 (4,435,854) (06/247,776) (03/13/84) (03/26/81) Errata In the list of patents which expired on March 21, 1993, due to failure to pay maintenance fees, in the O.G. of June 08, 1993, the following patent should not have appeared: Patent Number Serial Number Issue Date Filing Date 4,813,924 06/710,018 03/21/89 03/08/85