Erratum

   In the list of patents which expired on May 08, 1994, due to failure to
pay maintenance fees, in the O.G. of July 19, 1994 and April 11, 1995, the
following Reissue Patent should not have appeared:

Patent Number        Serial Number         Issue Date          Filing Date

Re. 33,279             07/315,242           07/31/90              02/27/89
(4,587,489)           (06/539,780)         (05/06/86)           (10/07/83)