On August 6th,1935, William Coolidge obtained a patent for the cathode ray tube, a critical ingredient of TV - This Day in Patent History

PatentYogi_This Day in Patent History_Aug 06

Coolidge was one of the most important innovators of the 20th century in his field. Coolidge developed the ductile tungsten filament used in lightbulbs, fluorescent lamps, car ignitions and vacuum tubes.

Patent Information
Publication number: US2010712 A
Patent Title: Cathode ray tube
Publication date: 6 Aug 1935
Filing date: 23 Sep 1930
Priority date: 23 Sep 1930
Inventors: Coolidge William D
Original Assignee: Gen Electric