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  1. Thomas Edison’s First Patented Invention | Mental Floss

  2. Thomas Edison's Electric Vote Recorder | Suiter Swantz IP

  3. Vote Recorder - edison.rutgers.edu

  4. Patent Model of Edison's Electrographic Vote Recorder and Register

  5. Thomas Edison's First Patented Invention Was An Electric

  6. Thomas Edison's Inventive Life | Lemelson Center for the Study of ...

  7. Edison’s first patented invention, the Electrographic Vote Recorder ...