ALEXANDRIA, Va., March 24 -- United States Patent no. 12,586,747, issued on March 24, was assigned to Denka Co. Ltd. (Tokyo).
"Emitter and device comprising same" was invented by Daisuke Ishikawa (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An emitter includes: an insulator; a pair of conductive terminals attached to the insulator and spaced apart from each other; a heater disposed between tips of the pair of conductive terminals and generating heat when energized; an electron source heated by the heater and made of a first material emitting electrons; a Wehnelt electrode having an inner surface forming an internal space along with a surface of the insulator, and applying a bias voltage across the W...