US Patent Issued to NIPPON TELEGRAPH AND TELEPHONE on June 10 for "Optical communication apparatus, optical communication system and optical communication method" (Japanese Inventor)

ALEXANDRIA, Va., June 18 -- United States Patent no. 12,328,537, issued on June 10, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).

"Optical communication apparatus, optical communication system and optical communication method" was invented by Manabu Yoshino (Musashino, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An optical communication device includes an optical switch that outputs an optical signal input from one of a plurality of transmission lines to another transmission line among the plurality of transmission lines, a monitoring unit that relays an optical signal in a transmission line on a side where the optical signal is output from the optical switch, a blocking unit that bl...