United States Patent and Trademark Office OG Notices: 21 March 2006

                                   Erratum


   In the notice of Certificate of Correction appearing in February 21,
2006, delete all reference to Patent No. 6,494,342, issue of January 31,
2006. No certificate of correction was issued for this patent.


                                   Erratum


   In the notice of Certificate of Correction appearing in February 21,
2006, delete all reference to Patent No. 6,900,002, issue of January 31,
2006. No certificate of correction was issued for this patent.


                                   Erratum


   In the notice of Certificate of Correction appearing in December 14,
2004, delete all reference to Patent No. 6,465,179, issue of November 23,
2004. No certificate of correction was issued for this patent.