Example image of eyePlorer eyePlorer map for 'Elisha Gray': United States Highland Park, Illinois Invention of the telephone Alexander Graham Bell Barnesville, Ohio Religious Society of Friends Oberlin College Telegraphy Western Union Graybar Electric Company Anson Stager Acoustic Telegraph J. P. Morgan Western Electric Synthesizer Patent caveat 1876 First to file and first to invent United States Patent and Trademark Office Marcellus Bailey Proof of concept Telautograph Xerox World's Columbian Exposition Closed-circuit television Newtonville, Massachusetts The Telephone Gambit Rosehill Cemetery, Chicago Elisha Gray and Alexander Bell telephone controversy List of scientific priority disputes Acoustic telegraphy List of people from Ohio Reading Works Gray (surname) New York Telephone Water microphone Telephone Graphics tablet Alcatel-Lucent Gray code Timeline of the telephone Telecommunication History of the telephone Poul la Cour February 14 George Sweigert August 2 The Big Book Of 1835 Pen computing