ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,487,436, issued on Dec. 2, was assigned to Nittoh Inc. (Nagano, Japan).

"Image-forming optical system, projection device, and imaging device" was invented by Takahiko Matsuo (Nagano, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An image formation optical system includes a first optical system, in which a first refractive system is arranged toward the reduction side of an intermediate image and a second refractive system is arranged toward the magnification side of the intermediate image, and the first refractive system has a first stop, and the second refractive system has a second stop. Lens surfaces are arranged next to and both toward the redu...