ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,439,187, issued on Oct. 7, was assigned to NEC Corp. (Tokyo).
"Optical branching/coupling device and method for controlling same" was invented by Ryu Kurahashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A branching/coupling device is provided with: first to third optical transmission paths; a first multi/demultiplexer that outputs a first optical signal based on the wavelength-multiplexed optical signals inputted from the second and third optical transmission paths, outputs a second optical signal based on the wavelength-multiplexed optical signals inputted from the first and third optical transmission paths, and outputs a third optical signal...