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Liquid chromatograph
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Patent number 5,132,012
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Issue date Jul 21, 1992
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Hitachi, Ltd.
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Junkichi Miura
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G01 - MEASURING TESTING
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Ion selective electrode
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Patent number 5,112,471
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Issue date May 12, 1992
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Hitachi, Ltd.
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Yasuhisa Shibata
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G01 - MEASURING TESTING
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Planar oxygen sensor
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Patent number 5,102,525
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Issue date Apr 7, 1992
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Hitachi, Ltd.
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Yuji Miyahara
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G01 - MEASURING TESTING
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