United States Patent and Trademark Office OG Notices: 17 April 2007
Erratum In the notice of Certificate of Correction appearing in January 16, 2007 Official Gazette, delete the reference, Patent No. 6,994,528 and substitute therefore the reference, Patent No. 6,991,528. The certificate of correction for this patent is valid. The certificate of correction was granted and the patent number should have been included on the certificate of correction issue list for December 26, 2006.