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Yoshihiko Tachikawa
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Tokyo, JP
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last 30 patents
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Patent Grant
Optical-fiber inspection device
Patent number
6,008,487
Issue date
Dec 28, 1999
Yokogawa Electric Corporation
Yoshihiko Tachikawa
G01 - MEASURING TESTING
Information
Patent Grant
Optical spectrum analyzer and spectrometer
Patent number
5,933,235
Issue date
Aug 3, 1999
Yokogawa Electric Corporation
Yoshihiro Sampei
G01 - MEASURING TESTING
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Patent Grant
Optical frequency domain reflectometer for use as an optical fiber...
Patent number
5,844,235
Issue date
Dec 1, 1998
Yokogawa Electric Corporation
Yoshihiko Tachikawa
G01 - MEASURING TESTING