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:
Feb. 05, 2008
Filed:
Mar. 31, 2006
Akira Sugiyama, Kawasaki, JP;
Taiichi Takeda, Kawasaki, JP;
Akira Sugiyama, Kawasaki, JP;
Taiichi Takeda, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A main line cable and a backup line cable are laid in a land portion in different routes. A land terminal station includes a break detecting unit that detects a break of the main line cable, and a path switching unit that switches a transmission path to the backup line cable. The break detecting unit detects a break of the cables based on a received-light level of a main signal transmitted from an underwater cable, or based on a received-light level of a returned monitor signal that has been output by the break detecting unit and reflected by the beach manhole. The beach manhole includes optical couplers that couple and divide the main signal for the main line cable and the backup line cable, a fiber grating that reflects the monitor signal, and an optical director.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile