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Insulated fuel cell
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Patent number 5,213,909
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Issue date May 25, 1993
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Hitachi, Ltd.
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Sei Takashima
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H01 - BASIC ELECTRIC ELEMENTS
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Fuel cell
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Patent number 4,902,587
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Issue date Feb 20, 1990
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Hitachi, Ltd.
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Toshihiro Saitoh
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H01 - BASIC ELECTRIC ELEMENTS
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Fuel cell
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Patent number 4,781,996
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Issue date Nov 1, 1988
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Hitachi, Ltd.
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Hajime Toriya
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H01 - BASIC ELECTRIC ELEMENTS
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Furnace system
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Patent number 4,653,998
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Issue date Mar 31, 1987
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Hitachi, Ltd.
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Ken-ichi Sohma
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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