ALEXANDRIA, Va., June 19 -- United States Patent no. 12,334,845, issued on June 17, was assigned to Nanjing Chervon Industry Co. Ltd. (Nanjing, China).
"Power tool" was invented by Aihua Xie (Nanjing, China), Yanqing Xu (Nanjing, China), Guang Li (Nanjing, China) and Shuang Li (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A power tool includes a motor, a speed regulation mechanism, a driver circuit, and a control module. The motor includes a stator winding and a rotor. The speed regulation mechanism is at least used for setting a target rotational speed of the motor. The driver circuit is used for delivering electrical energy provided by a power supply device from a direct current bus to the...