Independent inventor convicted and gaoled by AT&T for "misdemeanor attachment", the crime of attaching non-AT&T equipment to AT&T's phone network.
https://en.wikipedia.org/wiki/Walter_L._Shaw
More on this in the first bit of "The Inventor and the Thief" on Snap Judgement:
https://www.wnycstudios.org/podcasts/snapjudgment/episodes/l...