Errata

   In the list of patents which expired on November 22, 1995, due to
failure to pay maintenance fees, in the O.G. of January 22, 1996, the
following patent should not have appeared:

Patent             Serial                 Issue               Filing
Number             Number                 Date                Date

4,416,047          06/308,552             11/22/83            07/30/80



                                    Errata

  In the list of patents which expired on August 23, 1995, due to
failure to pay maintenance fees, in the O.G. of October 31, 1995, the
following patent should not have appeared:

Patent             Serial                 Issue               Filing
Number             Number                 Date                Date

4,687,353          06/856,457             08/18/87            04/28/86