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Kuniharu Kato
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Tokaimura, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Wavelength multiplexing/demultiplexing unit, wavelength multiplexin...
Patent number
6,885,823
Issue date
Apr 26, 2005
NTT Electronics Corporation
Kuniharu Kato
G02 - OPTICS
Information
Patent Grant
Optical wavelength division multiplexing transmission network device
Patent number
6,718,140
Issue date
Apr 6, 2004
Nippon Telegraph and Telephone Corporation
Shin Kamei
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical module
Patent number
6,480,639
Issue date
Nov 12, 2002
Nippon Telegraph & Telephone Corp.
Toshikazu Hashimoto
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
Compact optical switching module including thin-film heaters and tr...
Patent number
5,513,285
Issue date
Apr 30, 1996
Oki Electric Industry Co. Ltd.
Toshiyuki Kawashima
G02 - OPTICS
Information
Patent Grant
Optical fiber connector unit and optical fiber connector
Patent number
5,436,995
Issue date
Jul 25, 1995
Nippon Telegraph & Telephone Corporation
Takashi Yoshizawa
G02 - OPTICS
Information
Patent Grant
Guided-wave circuit module and wave-guiding optical component equip...
Patent number
5,327,517
Issue date
Jul 5, 1994
Nippon Telegraph & Telephone Corporation
Yasufumi Yamada
G02 - OPTICS
Information
Patent Grant
Waveguide-type optical matrix switch
Patent number
5,247,594
Issue date
Sep 21, 1993
Nippon Telegraph & Telephone Corporation
Masayuki Okuno
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
Wavelength multiplexing/demultiplexing unit, wavelength multiplexin...
Publication number
20030202742
Publication date
Oct 30, 2003
NTT Electronics Corporation
Kuniharu Kato
G02 - OPTICS
Information
Patent Application
OPTICAL MODULE
Publication number
20020001427
Publication date
Jan 3, 2002
TOSHIKAZU HASHIMOTO
G02 - OPTICS
Information
Patent Application
Wavelength multiplexing/demultiplexing unit, wavelength multiplexin...
Publication number
20010012424
Publication date
Aug 9, 2001
Kuniharu Kato
G02 - OPTICS