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Fuel cell apparatus
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Patent number 4,554,223
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Issue date Nov 19, 1985
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Hitachi, Ltd.
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Eiji Yokoyama
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C01 - INORGANIC CHEMISTRY
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Color solid-state imager
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Patent number 4,412,236
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Issue date Oct 25, 1983
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Hitachi, Ltd.
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Akira Sasano
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H01 - BASIC ELECTRIC ELEMENTS
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Method of producing color filters
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Patent number 4,311,773
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Issue date Jan 19, 1982
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Hitachi, Ltd.
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Tadao Kaneko
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Chemically digestive agents
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Patent number 4,101,440
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Issue date Jul 18, 1978
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Hitachi, Ltd.
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Motoo Akagi
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY