4 public-domain matches

Electron Devices

Cathode Rays

Joseph John Thomson

Cover of IS 11900: Tungsten rods and tungsten wire for lamps and electron devices

IS 11900: Tungsten rods and tungsten wire for lamps and electron devices

Bureau of Indian Standards

Cover of IS 1885-4-8: Electrotechnical vocabulary, Part 4: Electron tubes, Section 8: Photosensitive devices

IS 1885-4-8: Electrotechnical vocabulary, Part 4: Electron tubes, Section 8: Photosensitive devices

Bureau of Indian Standards

Cover of US Patent 2601024: Electrode structure for electron discharge devices

US Patent 2601024: Electrode structure for electron discharge devices

Sylvania Electric Prod