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:
Apr. 21, 2026
Filed:
Jan. 13, 2022
Nec Corporation, Tokyo, JP;
Akira Masuda, Tokyo, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In order to provide an optical path identification device and the like whereby it is possible to identify a switched optical path without incorporating a transceiver mechanism into an optical path switching device, this optical path identification device is provided with: an optical path identification unit that identifies whether a connected optical path connected to a first optical path is any of a plurality of optical paths from return light information regarding inspection light transmitted to the first optical path and representing the change in intensity over time of return light from the connected optical path; and an output unit for outputting the identification result.