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Shigekazu Harada
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Wavelength division multiplexing transmission system and remote app...
Patent number
8,139,940
Issue date
Mar 20, 2012
NEC Corporation
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength division multiplexing transmission system and remote app...
Patent number
7,684,703
Issue date
Mar 23, 2010
NEC Corporation
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission switching device
Patent number
7,609,728
Issue date
Oct 27, 2009
NEC Corporation
Toshiaki Arikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission method, transmitter-receiver, and transmitting-receivi...
Patent number
7,580,634
Issue date
Aug 25, 2009
NEC Corporation
Takeshi Takeuchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Multiplex communication system and method
Patent number
7,372,804
Issue date
May 13, 2008
NEC Corporation
Toshiaki Arikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Wavelength division-multiplexing optical transmission system
Patent number
7,295,779
Issue date
Nov 13, 2007
NEC Corporation
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Transmission system, and station unit and remote units to be used t...
Patent number
6,574,019
Issue date
Jun 3, 2003
NEC Corporation
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Data transmission system and a terminal management method of the same
Patent number
5,963,558
Issue date
Oct 5, 1999
NEC Corporation
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
Wavelength Division Multiplexing Transmission system and Remote App...
Publication number
20100142953
Publication date
Jun 10, 2010
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
TRANSMISSION METHOD, TRANSMITTER-RECEIVER, AND TRANSMITTING-RECEIVI...
Publication number
20090279897
Publication date
Nov 12, 2009
NEC Corporation
Takeshi Takeuchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission switching device
Publication number
20060072923
Publication date
Apr 6, 2006
NEC Corporation
Toshiaki Arikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Transmission loss and gain measurement method, transmitter-receiver...
Publication number
20050111843
Publication date
May 26, 2005
NEC Corporation
Takeshi Takeuchi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength division multiplexing transmission system and remote app...
Publication number
20040179855
Publication date
Sep 16, 2004
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Multiplex communication system and method
Publication number
20030133712
Publication date
Jul 17, 2003
NEC Corporation
Toshiaki Arikawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Wavelength division-multiplexing optical transmission system
Publication number
20030067652
Publication date
Apr 10, 2003
NEC Corporation
Shigekazu Harada
H04 - ELECTRIC COMMUNICATION TECHNIQUE