Not all that obscure. When I was an Electronics Engineering major at Cal Poly in San Luis Obispo, way back in 1963, Farnsworth came and gave a talk in our little auditorium. Afterwards, he hung around and chatted with individual students. I've known who he was since the 50s.
P.T. Farnsworth, U.S. Patent 1773980: Television system (filed Jan. 7, 1927)
P.T. Farnsworth, U.S. Patent 2089054: Incandescent light source
P.T. Farnsworth, U.S. Patent 2184910: Cold cathode electron discharge tube
P.T. Farnsworth, U.S. Patent 2221374: X-ray projection device
P.T. Farnsworth, U.S. Patent 2263032: Cold cathode electron discharge tube
P.T. Farnsworth, U.S. Patent 3258402: Electric discharge device for producing interaction between nuclei
P.T. Farnsworth, U.S. Patent 3386883: Method and apparatus for producing nuclear fusion reactions
P.T. Farnsworth, U.S. Patent 3664920: Electrostatic containment in fusion reactors