ALEXANDRIA, Va., April 9 -- United States Patent no. 12,272,514, issued on April 8, was assigned to SHANGHAI UNITED IMAGING HEALTHCARE Co. LTD. (Shanghai).
"Electron gun" was invented by Ruiying Song (Shanghai) and Peng Cheng (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electron gun may include a cathode with an emitting surface configured to emit electrons. The cathode may include a through hole that goes through the emitting surface and is configured to allow back-streaming electrons of the emitted electrons to pass through. The electron gun may also include an anode configured to attract the emitted electrons from the cathode to the anode and focus the emitted electrons into an electron bea...