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Ion microanalyzer
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Patent number 3,986,025
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Issue date Oct 12, 1976
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Hitachi, Ltd.
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Mitsuo Fujiwara
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H01 - BASIC ELECTRIC ELEMENTS
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3866042
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Patent number 3,866,042
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Issue date Feb 11, 1975
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H01 - BASIC ELECTRIC ELEMENTS
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3673404
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Patent number 3,673,404
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Issue date Jun 27, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3610921
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Patent number 3,610,921
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Issue date Oct 5, 1971
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H01 - BASIC ELECTRIC ELEMENTS