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Akira Yahagi
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Shiroishi-shi, JP
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Patents Grants
last 30 patents
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Patent Grant
Variable optical attenuator
Patent number
6,950,596
Issue date
Sep 27, 2005
NEC TOKIN Corporation
Akira Yahagi
G02 - OPTICS
Patents Applications
last 30 patents
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Patent Application
Variable optical attenuator
Publication number
20040101245
Publication date
May 27, 2004
NEC Tokin Corporation
Akira Yahagi
G02 - OPTICS