ALEXANDRIA, Va., May 26 -- United States Patent no. 12,638,305, issued on May 26, was assigned to Hitachi Astemo Ltd. (Hitachinaka, Japan).
"Map processing device and map processing method" was invented by Masahiro Kiyohara (Tokyo), Hiroki Ota (Tokyo) and Takeshi Ogata (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A problem to be solved by the present invention is that a host vehicle position calculated on the basis of a GNSS is affected by shielding, reflection, diffraction, and the like of a positioning radio wave due to a structure, depending on a structure environment present around a receiver and an arrangement of positioning satellites at the date and time, and a detected measured position is o...