Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraph Instruments – Printing-Telegraph Instruments – Transmitters and Circuits for Printing-Telegraphs – Unison-Stops for Printing-Telegraphs – Paper for Chemical Telegraphs etc. – Apparatus for Perforating Paper for Telegraphic Use – Electrical Printing-Machines – Type-Writing Machines – Printing-Telegraph Instruments (1873) – Automatic Telegraph Instruments – Electro-Magnetic Adjusters – Circuits for Chemical Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Printing-Telegraphs – Circuits for Printing-Telegraphs – Circuits for Automatic or Chemical Telegraphs – Circuits for Automatic Telegraphs – Chemical Telegraphs – Perforators for Automatic Telegraphs – Circuits for Automatic Telegraphs – Relay-Magnets – Electrical Regulators for Transmitting-Instruments – Galvanic Batteries – Telegraph-Signal Boxes – Electric Telegraphs – Perforators for Automatic Telegraphy – Chemical Telegraphs – Circuits for Chemical Telegraphs – Duplex Telegraphs – Telegraph-Relays – Receiving Instruments for Chemical Telegraphs – Chemical or Automatic Telegraphs – Automatic Telegraphy and Perforators Therefor – District Telegraph Signal-Boxes – Duplex Chemical Telegraphs – Telegraph Apparatus – Solutions for Chemical Telegraph-Paper – Solutions for Chemical Telegraph-Paper – Solutions for Chemical Telegraph-Paper – Adjustable Electro-Magnets for Relays, etc. – Solutions for Chemical Telegraph-Paper – Duplex Telegraphs – Chemical Telegraphy – Chemical Telegraphy – Chemical Telegraphy – Printing-Telegraphs – Transmitters and Receivers for Automatic Telegraphs – Automatic Telegraphs – Duplex Telegraphs – Solutions for Chemical Telegraphs – Solutions for Chemical Telegraphs – Recording-Points for Chemical Telegraphs – Electric-Signalling Instruments – Telegraph Apparatus – Automatic Roman-Character Telegraphs – Automatic Telegraphy Second hundred (101 to 200) In the second hundred patents, Edison continues his work with the telegraph. He also starts to patent electrical distribution and the light. – Duplex Telegraphs (1876) – Duplex Telegraphs – Duplex Telegraphs – Autographic Printing – Duplex Telegraphs – Acoustic Telegraph – Electro-Harmonic Multiplex Telegraphs – Acoustic Electric Telegraphs – Telegraphic Alarm and Signal Apparatus – Automatic Telegraphs – Automatic Telegraphs – Stencil-Pens – Telephonic Telegraphs – Telephonic Telegraphs – Telephonic or Electro-Harmonic Telegraphs – Synchronous Movements for Electric Telegraphs – Phonograph or Speaking Machines : The first phonograph, a device for recording and replaying sound. Edison demonstrated the device for the first time on November 29, 1878. The device recorded on a phonograph cylinder using up-down (vertical) motion of the stylus. Edison's patent specified that the audio recording was embossed. – Acoustic Telegraphs – Automatic-Telegraph Perforator and Transmitter – Speaking-Machines – Speaking-Telegraphs – Speaking-Telegraphs – Speaking-Telegraphs – Speaking-Telephones –