ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,729, issued on June 2, was assigned to Oriental Motor Co. Ltd. (Tokyo).
"Motion detector" was invented by Sakao Ozeki (Kakegawa, Japan), Akihiko Houda (Tsukuba, Japan) and Masayuki Someya (Tsukuba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A detector that is downsized by efficiently applying a high-period alternating magnetic field to a magnetic wire by use of a plurality of magnetic-field generation sources is provided. A detector 400 detects motion of a moving body 410 by use of a power generation sensor 420. The power generation sensor includes a magnetic wire 421 and a coil 422, and the moving body includes a soft magnetic body portion...