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:
Nov. 04, 2003
Filed:
Jul. 30, 1998
Applicant:
Inventors:
Makoto Nishio, Tokyo, JP;
Naoya Henmi, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 1/228 ; H04J 1/402 ; H04J 3/04 ;
U.S. Cl.
CPC ...
H04L 1/228 ; H04J 1/402 ; H04J 3/04 ;
Abstract
Optical signals having arbitrary wavelengths of wavelength-multiplex optical signals are separated in an optical add-dorop multiplexer . Switching of the signals after separation and an external signal that is input outside is conducted in an ATM switch . The signals after the switching by the ATM switch is combined with wavelength-multiplex signals in the optical add-dorop multiplexer