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U.S. Patent 0,090,646 -- Electrographic Vote-Recorder : Edison's first patent. Permitted a "yes" or "no" vote via one of two switches. Washington congressmen were not interested in the device and the invention was a failure. (1869)

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current21:47, 26 May 2007398×659 (280 KB)Reddi (Talk | contribs) (U.S. Patent 0,090,646 -- Electrographic Vote-Recorder : Edison's first patent. Permitted a "yes" or "no" vote via one of two switches. Washington congressmen were not interested in the device and the invention was a failure. (1869))

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