United States Patent and Trademark Office OG Notices: 13 April 2004

                                    Erratum

   In the notice of Certificate of Correction appearing in
September 2, 2003, delete all reference to Patent No. 6,550,400, issue
of December 16, 2003. No certificate of correction was issued for this
patent.


                                    Erratum

   In the notice of Certificate of Correction appearing in
December 9, 2003, delete all reference to Patent No. 6,548,835, issue
of December 30, 2003. No certificate of correction was issued for this
patent.


                                    Erratum

   In the notice of Certificate of Correction appearing in
February 24, 2004, delete all reference to Patent No. 6,519,644, issue
of February 3, 2004. No certificate of correction was issued for this
patent.