Patents

U.S. patent images in TIFF format

• U.S. Patent 161,739 Improvement in Transmitters and Receivers for Electric Telegraphs, filed March 1875, issued April 1875 (multiplexing signals on a single wire)
• U.S. Patent 174,465 Improvement in Telegraphy, filed February 14, 1876, issued March 7, 1876 (Bell's first telephone patent)
• U.S. Patent 178,399 Improvement in Telephonic Telegraph Receivers, filed April 1876, issued June 1876
• U.S. Patent 181,553 Improvement in Generating Electric Currents (using rotating permanent magnets), filed August 1876, issued August 1876
• U.S. Patent 186,787 Electric Telegraphy (permanent magnet receiver), filed January 15, 1877, issued January 30, 1877
• U.S. Patent 235,199 Apparatus for Signalling and Communicating, called Photophone, filed August 1880, issued December 1880
• U.S. Patent 757,012 Aerial Vehicle, filed June 1903, issued April 1904

Movie biographies

• Animated Hero Classics: Alexander Graham Bell (1995) at the Internet Movie Database
• The Story of Alexander Graham Bell, 1939 film reformatted for VCR tape, Don Ameche playing Bell, (1966) ISBN 0-7939-1251-2
• Biography — Alexander Graham Bell, A&E DVD biography based on historical footage and still pictures of Bell, (2005)
• The Sound and the Silence (1992) (TV) with John Bach as Alexander Graham Bell; Canada / New Zealand / Ireland Sound and the Silence

                                                             

                                                                                                               Recording of Bell's voice on a wax disc in 1885, identified in 2013