亚历山大·格雷厄姆·贝尔(英語:Alexander Graham Bell,/ˈɡreɪ.əm/;1847年3月3日—1922年8月2日)是一位蘇格蘭出身的發明家及企业家。他獲得了世界上第一台可用的电话机的專利權(發明者有爭議),创建了貝爾電話公司(AT&T公司的前身)。同時也是國家地理學會的創辦人之一與第二任主席
美國專利第161,739号Improvement in Transmitters and Receivers for Electric Telegraphs, filed March 1875, issued April 1875 (multiplexing signals on a single wire)
美國專利第174,465号Improvement in Telegraphy, filed February 14, 1876, issued March 7, 1876 (Bell's first telephone patent)
美國專利第178,399号Improvement in Telephonic Telegraph Receivers, filed April 1876, issued June 1876
美國專利第181,553号Improvement in Generating Electric Currents (using rotating permanent magnets), filed August 1876, issued August 1876
美國專利第186,787号Electric Telegraphy (permanent magnet receiver), filed January 15, 1877, issued January 30, 1877
美國專利第235,199号Apparatus for Signalling and Communicating, called Photophone, filed August 1880, issued December 1880
美國專利第757,012号Aerial Vehicle, filed June 1903, issued April 1904