U.S.Department of Commerce National Technical Service. U.S.Department of commerce National Technical Service ; U.S. Department of Commerce, National Technical Information Service. U.S. Department of Commerce National Technical Information Service. U.S Department of Commerce National Technial Information Service U.S. Department of Commerce National Technical Information Service ; U.S. Department of Commerce National Technical Information Services. U.S. Department of commerce National Technical Information Service. U.S. Department of commerce National Technical Information Servics. U.S. Department of Commerce. Patent and Trademark Office