United States Patent and Trademark Office OG Notices: 15 June 2004

                                    Erratum

   In the notice of Certificate of Correction appearing in
September 2, 2003, delete all reference to Patent No. 6,559,588, issue
of September 23, 2003. No certificate of correction was issued for this
patent.


                                    Erratum

   In the notice of Certificate of Correction appearing in May 4,
2004, delete all reference to Patent No. 6,680,580, issue of April 13,
2004. No certificate of correction was issued for this patent.