US Patent Issued to AICHI STEEL on Feb. 25 for "Position estimation method and position estimation system" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,236,781, issued on Feb. 25, was assigned to AICHI STEEL Corp. (Tokai, Japan).

"Position estimation method and position estimation system" was invented by Michiharu Yamamoto (Tokai, Japan) and Hitoshi Aoyama (Tokai, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A position estimation system for a vehicle including a magnetic sensor which measures magnetism acting from a road surface side forming a surface of a traveling road to estimate an own vehicle position includes a map DB which stores a map (1) associated with a road-surface magnetic distribution (M2), which is a distribution of quantities of magnetism at respective points on the road surface...