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Koichi Maru
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Ibaraki, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Array waveguide grating and method of manufacture thereof
Patent number
6,556,749
Issue date
Apr 29, 2003
Hitachi Cable Limited
Hisato Uetsuka
G02 - OPTICS
Information
Patent Grant
Optical wavelength multiplexer/demultiplexer
Patent number
6,549,696
Issue date
Apr 15, 2003
Hitachi Cable, Ltd.
Hisato Uetsuka
G02 - OPTICS
Information
Patent Grant
Optical wavelength routing device
Patent number
6,317,534
Issue date
Nov 13, 2001
Kokusai Denshin Denwa Co., Ltd.
Tetsuya Miyazaki
G02 - OPTICS
Information
Patent Grant
Optical wavelength multiplexer/demultiplexer
Patent number
6,069,990
Issue date
May 30, 2000
Hitachi Cable Ltd.
Masahiro Okawa
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
Array waveguide grating and method of manufacture thereof
Publication number
20030007728
Publication date
Jan 9, 2003
Hisato Uetsuka
G02 - OPTICS