The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2025
Filed:
Aug. 20, 2021
Nec Corporation, Tokyo, JP;
Ryu Kurahashi, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
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 based on the wavelength-multiplexed optical signals inputted from the first and second optical transmission paths; a second multi/demultiplexer that outputs one of the first to third optical signals based on the wavelength-multiplexed optical signals; an optical splitter that distributes the wavelength-multiplexed optical signals to the first and second multi/demultiplexer; and an optical switch that selects either the first to third optical signals generated in the first multi/demultiplexer or the second multi/demultiplexer, and outputs the selected optical signals to the output destinations.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile