ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,442,664, issued on Oct. 14, was assigned to Panasonic Intellectual Property Management Co. Ltd. (Osaka, Japan).
"Rotation detector and rotation detection method" was invented by Masaki Tanaka (Nara, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a rotation detector capable of suppressing the occurrence of erroneous detection. Rotation detector includes magnet that rotates together with a rotary shaft, a plurality of power generation elements that generate power according to a change in a magnetic field due to rotation of magnet together with the rotary shaft, and a plurality of magnetic sensors provided to a corresponding one of the pl...