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Akio Sugita
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Mito, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Planar lightwave circuit type variable optical attenuator
Patent number
7,389,033
Issue date
Jun 17, 2008
Nippon Telegraph and Telephone Corporation
Yasuaki Hashizume
G02 - OPTICS
Information
Patent Grant
Polarization desensitized optical waveguide interferometer
Patent number
6,757,454
Issue date
Jun 29, 2004
Nippon Telegraph and Telephone Corporation
Yasuyuki Inoue
G02 - OPTICS
Information
Patent Grant
Optical waveguide circuit
Patent number
6,580,862
Issue date
Jun 17, 2003
Nippon Telegraph and Telephone Corporation
Toshimi Kominato
G02 - OPTICS
Information
Patent Grant
Planar lightwave circuit
Patent number
6,304,706
Issue date
Oct 16, 2001
Nippon Telegraph and Telephone Corporation
Akio Sugita
G02 - OPTICS
Information
Patent Grant
Packaging platform, optical module using the platform, and methods...
Patent number
6,222,967
Issue date
Apr 24, 2001
Nippon Telegraph and Telephone Corporation
Michiyuki Amano
G02 - OPTICS
Information
Patent Grant
Opto-electronic hybrid integration platform, optical sub-module, op...
Patent number
6,164,836
Issue date
Dec 26, 2000
Yasufumi Yamada
G02 - OPTICS
Information
Patent Grant
Opto-electronic hybrid integration platform, optical sub-module, op...
Patent number
6,027,254
Issue date
Feb 22, 2000
Nippon Telegraph & Telephone Corporation
Yasufumi Yamada
G02 - OPTICS
Information
Patent Grant
Opto-electronic hybrid integration platform, optical sub-module, op...
Patent number
5,621,837
Issue date
Apr 15, 1997
Nippon Telegraph & Telephone Corporation
Yasufumi Yamada
G02 - OPTICS
Information
Patent Grant
Integrated optical device and method for manufacturing thereof
Patent number
4,978,188
Issue date
Dec 18, 1990
Nippon Telegraph & Telephone Corporation
Masao Kawachi
G02 - OPTICS
Information
Patent Grant
Integrated optical device and method for manufacturing thereof
Patent number
4,900,112
Issue date
Feb 13, 1990
Nippon Telegraph & Telephone Corporation
Masao Kawachi
G02 - OPTICS
Information
Patent Grant
Polymer film with conductive pattern and method of manufacturing th...
Patent number
4,898,766
Issue date
Feb 6, 1990
Nippon Telegraph & Telephone Corporation
Toshiaki Tamamura
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Polymer film with conductive pattern and method of manufacturing th...
Patent number
4,608,129
Issue date
Aug 26, 1986
Nippon Telegraphy and Telephone
Toshiaki Tamamura
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Patents Applications
last 30 patents
Information
Patent Application
Planar Lightwave Circuit Type Variable Optical Attenuator
Publication number
20070212012
Publication date
Sep 13, 2007
Nippon Telegraph and Telephone Corporation
Yasuaki Hashizume
G02 - OPTICS
Information
Patent Application
OPTICAL WAVEGUIDE INTERFEROMETER
Publication number
20020181870
Publication date
Dec 5, 2002
Yasuyuki Inoue
G02 - OPTICS
Information
Patent Application
Optical waveguide circuit
Publication number
20020122650
Publication date
Sep 5, 2002
Toshimi Kominato
G02 - OPTICS