ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,237,811, issued on Feb. 25, was assigned to Canon K.K. (Tokyo).

"Device emitting or detecting terahertz waves, and manufacturing method for device" was invented by Yasushi Koyama (Kamakura, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device includes a first antenna arranged on a substrate, with the first antenna comprising a first semiconductor layer having terahertz-wave gain and a first conductor layer, a second antenna arranged on the substrate, with the second antenna comprising a second semiconductor layer having terahertz-wave gain and a second conductor layer, and a third conductor layer arranged on the substrate and electrically conne...