Não informado. (1872). Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress.
Chicago-Zitierstil (17. Ausg.)Não informado. Official Gazette of the United States Patent Office. Washington: U.S. Patent Office, Department of Congress, 1872.
MLA-Zitierstil (8. Ausg.)Não informado. Official Gazette of the United States Patent Office. U.S. Patent Office, Department of Congress, 1872.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.