COMMENTS ON TRADMARKING More Trademark info can be found on "http://www.uspto.gov" the PTO website. There are no on-line trademark search files anywhere on the free web that I know of. The PTO has a CDROM set called "CASSIS" has a trademark volume with searchable files and a good search engine. The Official Patent Depositary Libraries and many public libraries have CASSIS and the Trademark Gazettes. The PTO booklet "