Não informado. (1971). Official Gazette of the United States Patent and Trademark Office. U.S. Department of Commerce.
Chicago-Zitierstil (17. Ausg.)Não informado. Official Gazette of the United States Patent and Trademark Office. Washington: U.S. Department of Commerce, 1971.
MLA-Zitierstil (8. Ausg.)Não informado. Official Gazette of the United States Patent and Trademark Office. U.S. Department of Commerce, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.