1860
active Bell & Brother, 1860
U.S. Patent Office, 1910
U.S. Patent Office, 1920
U.S. Patent Office, 1860
U.S. Patent Office, 1840
U.S. Patent Office, 1880
U.S. Patent Office, 1970
U.S. Patent Office, 1900
U.S. Patent Office, 1890