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Thermosensitive stencil paper
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Patent number 5,219,637
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Issue date Jun 15, 1993
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Ricoh Company, Ltd.
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Fumiaki Arai
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Thermosensitive stencil paper
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Patent number 5,188,881
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Issue date Feb 23, 1993
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Ricoh Company, Ltd.
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Shoichi Sugiyama
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Thermosensitive stencil paper
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Patent number 5,091,257
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Issue date Feb 25, 1992
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Ricoh Company, Ltd.
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Masayasu Nonogaki
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS