ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,534, issued on May 20, was assigned to Nissei Ltd. (Tokyo).
"Antenna device" was invented by Tutomu Kaneko (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an antenna device capable of realizing isolation of more than 20 dB while keeping its size compact.The antenna device comprises a semicircular arc shaped first outer antenna element and first inner antenna element, which are formed concentrically on one surface of an insulating substrate, a semicircular arc shaped second outer antenna element and second inner antenna element, which are formed concentrically on another surface of the insulating substrate, an antenna-side coupling ...