US Patent Issued to MITSUBA on April 8 for "Motor device, wiper device, and motor control method" (Japanese Inventors)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,273,055, issued on April 8, was assigned to MITSUBA Corp. (Gunma, Japan).

"Motor device, wiper device, and motor control method" was invented by Ryo Ohori (Gunma, Japan), Tsuyoshi Osawa (Gunma, Japan) and Atsushi Mochida (Gunma, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention reduces the stoppage of operation due to a sudden decrease in rotation speed. A motor device includes a motor that is rotationally driven; a drive signal generator that controls a duty ratio indicating a drive output of the motor so as not to exceed a duty ratio upper limit value, and generates a drive signal corresponding to the duty ratio; an inverter that outp...