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Kouji Otani
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Hitachi, JP
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last 30 patents
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Patent Grant
Apparatus for detecting change in water quality
Patent number
4,220,858
Issue date
Sep 2, 1980
Hitachi, Ltd.
Takashi Ikeguchi
G01 - MEASURING TESTING
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Patent Grant
Method of treatment of waste water containing sulfur compounds
Patent number
4,154,673
Issue date
May 15, 1979
Hitachi, Ltd.
Kouji Otani
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE