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1874
1876
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1875

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Bell Patent Association formed so Sanders and Hubbard can share in proceeds from Bell's patents
Alexander Graham Bell Gardiner Greene Hubbard Thomas S. Sanders
Bell pitches his harmonic telegraph to Western Union's Orton, who declines
Bell pitches his harmonic telegraph to Western Union's Orton, who declines
Bell uses a bi-directional "gallows" telephone to transmit "voice-like sounds"
Bell uses a bi-directional "gallows" telephone to transmit "voice-like sounds"
Orton engages Thomas Edison to investigate harmonic telegraphy for Western Union
Thomas Edison William Orton
Bell completes the specifications for his telephone patent application
Alexander Graham Bell
Alexander Graham Bell realizes sound can be transmitted as a continuous electrical wave.
Alexander Graham Bell realizes sound can be transmitted as a continuous electrical wave.
Phelps' "Electro-Motor Printing Telegraph" enables 60 WPM speed
Phelps' "Electro-Motor Printing Telegraph" enables 60 WPM speed