Errata

   "All reference to Patent No. 5,631,139 to Martin Wong of Grayslake,
Ill., for METHOD AND COMPOSTIONS FOR ENHANCING AMINOLEVULINIC ACID
DEHYDRATASE ASSAY appearing in the Official Gazette of May 20, 1997,
should be deleted since no patent was granted."

   "All reference to Patent No. 5,654,332 to David Armistead of Maryland,
for METHODS AND COMPOSITIONS FOR STIMULATING NEURITE GROWTH appearing in
the Official Gazette of August 5, 1997, should be deleted since no
patent was granted."

   "All reference to Patent No. 5,688,268 to Gail Billings of Utah, for
ELECTROSURGICAL CUTTING DEVICE appearing in the Official Gazette of
November 18, 1997, should be deleted since no patent was granted."

   "All reference to Patent No. 5,690,205 to Steven G. Doherty, of Mass.,
for MACHINE SAFETY GUARD appearing in the Official Gazette of November
25, 1997, should be deleted since no patent was granted."

   "All reference to Patent No. 5,691,575 to Kouki Hagiya, et. al., of
Japan, for SEMICONDUCTOR MEMORY DEVICE appearing in the Official Gazette
of November 25, 1997, should be deleted since no patent was granted."

   "All reference to Patent No. 5,692,131 to Arlene M. Vance, et. al., of
Texas, for SYSTEM FOR CORPORATE TRAVEL PLANNING AND MANAGEMENT appearing
in the Official Gazette of November 25, 1997, should be deleted since no
patent was granted."