ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,339, issued on Nov. 25.
"Retractable childproof lock" was invented by Zhen Zhang (Zhejiang, China) and Yingfeng Chen (Zhejiang, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure provides a retractable childproof lock. The lock includes a lock body and a lock tongue arranged in a mode of retractable movements, so as to achieve objectives of locking or unlocking through retractable movements of the lock tongue. When being locked, the lock tongue is extended relative to the lock body, so that a locking end approaches relative to a first surface of the lock body in a first direction, but moves away from relative to a second surface of ...