ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,921, issued on June 17, was assigned to Xiamen Topstar Lighting Co. Ltd. (Xiamen, China).
"Manual adjustment control apparatus for waterproof lamp" was invented by Xiaoyan Zhong (Xiamen, China) and Yongjie Wu (Xiamen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A manual adjustment control apparatus, applied in a waterproof lamp, includes a rotating part and a toggling assembly; the lamp housing is provided with a through hole with a folding edge, the rotating part is in interference fit with the stepped edge by the sealing rings on the circumferential side wall; and the rotating part is in gear engagement with the toggling assembly, which i...