ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,542, issued on Jan. 20, was assigned to LIGHT OPTICAL WORKS LTD. (Nagano, Japan).
"Optical sighting device" was invented by Kenichi Seki (Nagano, Japan), Kan Hanaoka (Nagano, Japan) and Tsutomu Akiba (Nagano, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical sighting device 10 used by being installed to a firearm includes: an objective system part 12, forming an inverted image of a target object on a first focal plane; and an erect system part 14, forming an erect image obtained by reversing the inverted image on a second focal plane. The erect system 14 has: lenses 112 to 116 arranged between the first focal plane and the second focal...