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Akira Kawaguchi
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Kyoto, JP
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last 30 patents
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Patent Grant
Apparatus for measuring characteristics of optical angle
Patent number
6,636,308
Issue date
Oct 21, 2003
Otsuka Electronics Co., Ltd.
Kazunori Tsutsui
G01 - MEASURING TESTING
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Patent Grant
Differential refractometer
Patent number
5,157,454
Issue date
Oct 20, 1992
Otsuka Electronics Co., Ltd.
Koichi Oka
G01 - MEASURING TESTING
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Patent Grant
Particle size measuring system
Patent number
5,015,094
Issue date
May 14, 1991
Otsuka Electronics Co., Ltd.
Koichi Oka
G06 - COMPUTING CALCULATING COUNTING