United States Patent and Trademark Office OG Notices: 16 Oct 2007

                                   Erratum

   In the notice of "PATENTS WHICH EXPIRED ON April 7, 2002 DUE TO FAILURE
TO PAY MAINTENANCE FEES" appearing in the Official Gazette of June 4, 2002,
all reference to Patent No. 5,736,831 which issued from Application No.
08/701,599 should be deleted since the relevant maintenance fee and
applicable surcharge were timely paid in that patent.

                                   Erratum

   In the notice of "PATENTS WHICH EXPIRED ON March 7, 2004 DUE TO FAILURE
TO PAY MAINTENANCE FEES" appearing in the Official Gazette of May 4, 2004,
all reference to Patent No. 6,033,184 which issued from Application No.
09/021,937 should be deleted since the relevant maintenance fee was timely
paid in that patent.

                                   Erratum

   In the notice of "PATENTS WHICH EXPIRED ON June 10, 2007 DUE TO FAILURE
TO PAY MAINTENANCE FEES" appearing in the Official Gazette of July 31,
2007, all reference to Patent No. 6,575,621 which issued from Application
No. 09/830,494 should be deleted since the relevant maintenance fee and
applicable surcharge were timely paid in that patent.