ALEXANDRIA, Va., July 16 -- United States Patent no. 12,360,445, issued on July 15, was assigned to Coretronic Corp. (Hsin-Chu, Taiwan).
"Focusing module and projection apparatus" was invented by Chih-Hui Chang (Hsin-Chu, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A focusing module includes a focusing ring and a projection lens mounting ring. The focusing ring has a first ring body and a first annular wall with a limiting hole. The projection lens mounting ring has a second annular wall which can rotate relative to the first annular wall along a circumferential direction of the first annular wall. The second annular wall has a through hole and a rotation buffer structure having a limiting portion ...