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109 Court St, Boston (Charles Williams Jr.'s shop)
1870 109 Court St, Boston (Charles Williams Jr.'s shop)
Western Union contracts with Thomas Edison and Elisha Gray to solve telegraph multiplexing
1873 Western Union contracts with Thomas Edison and Elisha Gray to solve telegraph m…
Alexander Graham Bell realizes that sound can be transmitted as a continuous electrical wave.
1875 Alexander Graham Bell realizes that sound can be transmitted as a continuous el… event
First Ericsson logo
1876 First Ericsson logo event
Bell's stock certificate in the new company
1877 Bell's stock certificate in the new company event
Berliner develops improved telephone transmitter (microphone)
1877 Berliner develops improved telephone transmitter (microphone) event
Bell and Watson stage public exhibitions of the telephone
1877 Bell and Watson stage public exhibitions of the telephone event
First telephone central office
1877 First telephone central office event
Sanders' original Bell stock certificate
1877 Sanders' original Bell stock certificate event
Swedish telephone
1877 Swedish telephone
Bell telephone roadshow
1877 Bell telephone roadshow
George Coy / Connecticut District Tel.
1877 George Coy / Connecticut District Tel.
Bell Telephone Co. becomes National Bell Telephone
1879 Bell Telephone Co. becomes National Bell Telephone event
Western Union building
1879 Western Union building event
Bell acquires Edison's carbon button amplifier microphone patents from Western Union
1879 Bell acquires Edison's carbon button amplifier microphone patents from Western … event