United States Patent and Trademark Office OG Notices: 10 April 2007

                                   Erratum


   In the notice appearing in March 13, 2007 Official Gazette, delete
duplicate reference to Patent No. 7,112,797, Certificate of Correction
issue of February 20, 2007.


                                   Erratum


   In the notice of Certificate of Correction appearing in March 13, 2007
Official Gazette, insert the reference, Patent No. 6,608,581. The
certificate of correction for this patent is valid. The certificate of
correction was granted and should have been included on the certificate of
correction issue list for February 20, 2007.


                                   Erratum


   In the notice appearing in March 13, 2007 Official Gazette, delete all
reference to Patent No. D 423,891, Certificate of Correction issue of
February 20, 2007. No certificate of correction was granted for this
patent.