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Thermosensitive recording medium
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Patent number 5,919,729
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Issue date Jul 6, 1999
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Ricoh Company, Ltd.
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Yasutomo Mori
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Thermosensitive recording medium
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Patent number 5,721,190
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Issue date Feb 24, 1998
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Ricoh Company, Ltd.
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Shuji Miyamoto
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Thermosensitive recording medium
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Patent number 5,703,006
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Issue date Dec 30, 1997
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Ricoh Company, Ltd.
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Yasutomo Mori
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Thermosensitive recording material
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Patent number 4,912,079
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Issue date Mar 27, 1990
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Ricoh Company, Ltd.
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Kanjirou Kawasaki
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS