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Tadashi Matsuoka
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Yokohama, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Element terminal and communication system
Patent number
8,898,312
Issue date
Nov 25, 2014
Hitachi, Ltd.
Miho Kondo
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission equipment preventing malfunction in recovery f...
Patent number
7,526,199
Issue date
Apr 28, 2009
Hitachi Communication Technologies, Ltd.
Kenro Sekine
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission equipment and supervisory system thereof
Patent number
6,839,164
Issue date
Jan 4, 2005
Hitachi, Ltd.
Junya Kosaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical coupler/branching filter
Patent number
6,771,854
Issue date
Aug 3, 2004
Hitachi, Ltd.
Tadashi Matsuoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical transmission system and optical coupler/branching filter
Patent number
6,563,978
Issue date
May 13, 2003
Hitachi, Ltd.
Tadashi Matsuoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Radio communication apparatus with expanded dynamic range
Patent number
5,689,814
Issue date
Nov 18, 1997
Hitachi, Ltd.
Hiroshi Hagisawa
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
ELEMENT TERMINAL AND COMMUNICATION SYSTEM
Publication number
20120124221
Publication date
May 17, 2012
Miho KONDO
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical termination apparatus and optical transmission system
Publication number
20070065089
Publication date
Mar 22, 2007
Tadashi Matsuoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission equipment preventing mulfunction in recovery f...
Publication number
20060018659
Publication date
Jan 26, 2006
Kenro Sekine
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical network system construction method and support system
Publication number
20050036788
Publication date
Feb 17, 2005
Tadashi Matsuoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system and optical coupler/branching filter
Publication number
20040197100
Publication date
Oct 7, 2004
Hitachi, Ltd
Tadashi Matsuoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system and optical coupler/branching filter
Publication number
20030206692
Publication date
Nov 6, 2003
Hitachi, Ltd
Tadashi Matsuoka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission equipment and supervisory system thereof
Publication number
20010030797
Publication date
Oct 18, 2001
Junya Kosaka
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Optical transmission system and optical coupler/branching filter
Publication number
20010024544
Publication date
Sep 27, 2001
Tadashi Matsuoka
G02 - OPTICS