ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,522, issued on Feb. 4, was assigned to I-TEK METAL MFG. Co. LTD. (Tainan, Taiwan).
"Electronic control door lock" was invented by Tsung-Yu Huang (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An electric control door lock includes an inner operational device, an outer operational device, and a latch bolt operably connected to the inner and outer operational devices. A rotating shaft is rotatably supported in an activation member and includes a driving threaded in threading connection with a driving spring. When the rotating shaft is driven by a motor to rotate, the driving spring moves along a longitudinal axis to actuate the activati...