United States Patent and Trademark Office OG Notices: 23 April 2002

                                    Erratum

   In the notice of Certificate of Correction appearing in October
9, 2001 O.G., Vol. 1251 O.G. 56, delete all reference to Patent No.
6,178,242, issue of October 9, 2001, the number was erroneously
mentioned and should be deleted since no certificate of correction was
issued.


                                    Erratum

   In the notice of Certificate of Correction appearing in March
26, 2002 O.G., Vol. 1256 O.G. 111, delete all reference to Patent No.
6,059,233, issue of March 5, 2002, the number was erroneously mentioned
and should be deleted since no certificate of correction was
issued.