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Electronic typewriter
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Patent number D290615
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Issue date Jun 30, 1987
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Ricoh Company, Ltd.
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Toshio Yamamoto
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D18 - Printing and office machinery
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Printer
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Patent number D287855
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Issue date Jan 20, 1987
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Ricoh Company Ltd.
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Toshio Yamamoto
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D14 - Recording, communication, or information retrieval equipment
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Printing ribbon cassette
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Patent number D286058
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Issue date Oct 7, 1986
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Ricoh Company, Ltd.
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Toshio Yamamoto
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D18 - Printing and office machinery
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Transfer-type thermal printer
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Patent number 4,614,949
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Issue date Sep 30, 1986
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Ricoh Company, Ltd.
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Kunio Hakkaku
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Laser printer
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Patent number D281256
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Issue date Nov 5, 1985
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Ricoh Company, Ltd.
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Toshio Yamamoto
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D18 - Printing and office machinery
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Electrostatic copier
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Patent number D263146
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Issue date Feb 23, 1982
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Ricoh Company, Ltd.
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Toshio Yamamoto
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D16 - Photography and optical equipment
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Electrostatic copier
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Patent number D260019
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Issue date Jul 28, 1981
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Ricoh Company, Ltd.
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Yasuyoshi Onoue
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D16 - Photography and optical equipment