ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,407, issued on June 3.
"Carabiner capable of adjusting length of harness" was invented by Rongtian Ma (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to field of outdoor sports, and discloses a carabiner capable of adjusting a length of a harness, including a main body. A limit pillar is fixedly arranged at one side of the main body. In the present disclosure, to mount the carabiner capable of adjusting the length of the harness, a clockwork spring is first placed in a groove of the main body, and a hole of a fixed gear is aligned with the limit pillar; then, a moving gear is placed in a clamping pillar ...