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:
Jun. 27, 2000
Filed:
Jul. 18, 1997
Yasushi Hara, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An optical communication network system that communicates by wavelength division multiplexing. The optical network system includes a plurality of communication devices for communicating with one another. At least one of the communication devices is connected as a connection communication device to each of plural multi/demultiplexing devices. A plurality of optical signals are assigned to as assigned optical signals to the communication devices, respectively. The optical signals have wavelengths different from one another, respectively. Each of the optical multi/demultiplexing devices includes a supplying section for supplying the connection communication device with a specific one of the assigned optical signals that is assigned to the communication device. The supplying section may be a bandpass filter for allowing the specific optical signal to pass therethrough and supplies the specific optical signal to the connection communication device.