ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,478,239, issued on Nov. 25, was assigned to PROLIFIC TECHNOLOGY INC. (Taipei, Taiwan).
"Device for conducting motor recognition and protection and vacuum cleaner using the same" was invented by Chia-Chang Hsu (Hsinchu County, Taiwan) and Ren-Yuan Yu (Hsinchu County, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A device for conducting motor recognition and protection is disclosed. The device comprises a current detection circuit and a microprocessor, of which the current detection circuit is used for detecting an operation current from a roller brush driving motor that is integrated in a suction head of a vacuum cleaner. Moreover, the microproce...