United States Patent and Trademark Office OG Notices: 12 March 2002

                                    Erratum

   Reference to Patent No. 6,246,656 appearing in the Certificate
of Correction listing in the Official Gazette of November 27, 2001,
should be deleted since the patent number was erroneously mentioned.

                                    Erratum

   Reference to Patent No. 6,250,997 appearing in the Certificate
of Correction listing in the Official Gazette of February 5, 2002,
should be deleted since the patent number was erroneously mentioned.