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Electromagnetic flowmeter
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Patent number 5,307,687
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Issue date May 3, 1994
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Hitachi, Ltd.
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Masatsugu Arai
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G01 - MEASURING TESTING
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Method of bonding alumina to metal
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Patent number 4,699,310
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Issue date Oct 13, 1987
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Hitachi, Ltd.
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Akiomi Kohno
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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Heat transfer apparatus
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Patent number 4,619,316
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Issue date Oct 28, 1986
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Hitachi, Ltd.
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Wataru Nakayama
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F28 - HEAT EXCHANGE IN GENERAL