ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,455,440, issued on Oct. 28, was assigned to SINTAI OPTICAL (SHENZHEN) Co. LTD. (Shenzhen, China) and ASIA OPTICAL Co. INC. (Taichung, Taiwan).
"Sight device" was invented by Ken Chiakan Chang (Taichung, Taiwan) and Tung-Ching Chen (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a sight device, an objective lens unit is disposed at an end of a housing. An ocular lens unit is disposed at another end of the housing and opposite to the objective lens unit. An erector unit is disposed between the objective lens unit and the ocular lens unit. A adjusting unit is movably disposed on the housing and radially propped against the erector unit ...