ALEXANDRIA, Va., June 10 -- United States Patent no. 12,290,164, issued on May 6, was assigned to GUANGZHOU STARS PULSE Co. LTD. (Guangzhou, China).
"Electronic limit control method of electric toothbrush and electric toothbrush" was invented by Yuwei Zhang (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electronic limit control method of an electric toothbrush and the electric toothbrush are provided. The electric toothbrush includes a brush head a motor connected to the brush head. A rotating shaft of the motor is configured to drive the brush head to rotate within a predetermined range. The motor of the electric toothbrush is controlled to continuously output a target holding force whe...