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Rotary multi-mirror driving motor
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Patent number 4,469,453
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Issue date Sep 4, 1984
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Hitachi Koki Company, Limited
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Hiroomi Kozawa
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Printing magnet drive device
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Patent number 4,254,705
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Issue date Mar 10, 1981
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Hitachi Koki Company Limited
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Masami Ishikawa
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Paper feed control system in a printer
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Patent number 4,228,938
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Issue date Oct 21, 1980
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Hitachi Koki Company Limited
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Hisayoshi Monma
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL