ALEXANDRIA, Va., Jan. 29 -- United States Patent no. 12,209,439, issued on Jan. 28, was assigned to Shenzhen Hongzhong Lock Industry Co. Ltd. (Shenzhen, China) and NOVUS TECHNOLOGY LLC (Bridgewater, N.J.).
"Electronic door lock" was invented by Shitong Liang (Guangdong, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A novel electronic door lock includes a shell, an outer handle and an elastic sliding tongue arranged in the shell. The elastic sliding tongue is threaded out from a first opening of the shell. The outer handle acts on the elastic sliding tongue to push the elastic sliding tongue back to the shell from the first opening. The shell includes a first clutch device and a limiting member. The fi...