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Printer
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Patent number 4,887,133
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Issue date Dec 12, 1989
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Ricoh Company, Ltd.
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Kunihiko Ikeda
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Memory cartridge
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Patent number 4,872,091
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Issue date Oct 3, 1989
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Ricoh Company, Ltd.
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Yoshio Maniwa
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G06 - COMPUTING CALCULATING COUNTING
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Printer
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Patent number 4,657,372
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Issue date Apr 14, 1987
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Kunihiko Ikeda
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY