CASSIS/ CLASS
CASSIS/CLASS.Patents. A U.S. Patent and Trademark Office database of patents sorted by classification, available at any PTO Depository Library. Cf. CASSIS/BIB. [Blacks Law 8th]
CASSIS/CLASS.Patents. A U.S. Patent and Trademark Office database of patents sorted by classification, available at any PTO Depository Library. Cf. CASSIS/BIB. [Blacks Law 8th]