Talk:Quadruplex telegraph

Latest comment: 11 years ago by LarryRoth in topic Untitled

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This page: Smithsonian's site claims that Edison made $40,000 for the rights to the quadruplex. Can anyone found a corroborating source? — Preceding unsigned comment added by LarryRoth (talkcontribs) 20:20, 1 February 2013 (UTC)Reply