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Copier
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Patent number 5,826,154
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Issue date Oct 20, 1998
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Ricoh Company, Ltd.
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Toshiki Yamashita
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Digital copier system
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Patent number 5,557,390
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Issue date Sep 17, 1996
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Ricoh Company, Ltd.
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Norifumi Ito
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Image forming system
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Patent number 5,467,181
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Issue date Nov 14, 1995
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Ricoh Company, Ltd.
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Jun Doi
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Digital copier system
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Patent number 5,440,372
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Issue date Aug 8, 1995
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Ricoh Company, Ltd.
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Norifumi Ito
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY