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Ink cartridge and ink jet printer
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Patent number 7,275,808
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Issue date Oct 2, 2007
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Ricoh Company, Limited
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Goro Katsuyama
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Printer ink cartridge
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Patent number D548779
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Issue date Aug 14, 2007
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Ricoh Company, Ltd.
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Goro Katsuyama
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D18 - Printing and office machinery
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Printer ink cartridge
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Patent number D541335
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Issue date Apr 24, 2007
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Ricoh Company, Ltd.
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Goro Katsuyama
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D18 - Printing and office machinery
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Scanner
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Patent number D541281
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Issue date Apr 24, 2007
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Ricoh Company, Ltd.
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Osamu Miki
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D14 - Recording, communication, or information retrieval equipment
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Printer ink cartridge
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Patent number D539342
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Issue date Mar 27, 2007
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Ricoh Company, Ltd.
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Goro Katsuyama
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D18 - Printing and office machinery
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Ink-jet printer
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Patent number D523073
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Issue date Jun 13, 2006
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Ricoh Company, Ltd.
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Kanae Amemiya
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D18 - Printing and office machinery
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Laser printer
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Patent number D501024
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Issue date Jan 18, 2005
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Ricoh Company, Ltd.
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Hiroko Suzuki
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D18 - Printing and office machinery
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Ink-jet printer
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Patent number D497944
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Issue date Nov 2, 2004
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Ricoh Company, Ltd.
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Kanae Amemiya
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D18 - Printing and office machinery
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Printer ink cartridge
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Patent number D497383
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Issue date Oct 19, 2004
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Ricoh Company, Ltd.
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Goro Katsuyama
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D18 - Printing and office machinery
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Printer ink cartridge
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Patent number D494616
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Issue date Aug 17, 2004
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Ricoh Company, Ltd.
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Goro Katsuyama
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D18 - Printing and office machinery
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Electronic copying machine
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Patent number D358411
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Issue date May 16, 1995
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Ricoh Company, Ltd.
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Yoshihisa Minakawa
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D18 - Printing and office machinery