ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,849, issued on Jan. 13, was assigned to TECHWAY INDUSTRIAL Co. LTD. (Taichung, Taiwan).
"Electric ratchet wrench" was invented by Chih-Hua Hsu (Taichung, Taiwan), Chen-Chen Cheng (Taichung, Taiwan) and Kuo-Chou Li (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric ratchet wrench includes a wrench main casing, a motor, a ratchet head casing and a motor fixing member. The wrench main casing has two main casing locking parts, the two main casing locking parts are symmetrically arranged at one end of the wrench main casing, the motor is accommodated in the wrench main casing, the ratchet head casing comprises a plug-connected p...