ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,566, issued on July 1, was assigned to NEC Corp. (Tokyo).
"Sensing range limiting device" was invented by Yutaka Yano (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical fiber sensing range limiting device comprises: a blocking unit that, on the basis of a control signal and for a prescribed period, causes probe light that has been sent to an optical fiber used in optical fiber sensing and has returned from the optical fiber to be blocked from being transmitted to a light detection unit, or causes a detection signal that is detected with respect to the return light to be blocked from being transmitted to a downstream processing unit; and...