ALEXANDRIA, Va., May 19 -- United States Patent no. 12,632,690, issued on May 19, was assigned to TDK Corp. (Tokyo).
"Antenna device and IC card having the same" was invented by Shoma Kajikiya (Tokyo), Toshio Tomonari (Tokyo) and Chris T. Burket (Lincolnshire, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is an antenna device that includes: a metal plate having a first slit extending in a long side direction thereof and a second slit extending in a short side direction thereof; a first coil disposed so as to overlap with the metal plate in a plan view and circling along an outer edge of the metal plate; and a second coil electrically connected to the first coil, disposed so as to be su...