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Electroconductive roller
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Patent number 7,445,588
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Issue date Nov 4, 2008
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SUMITOMO RUBBER INDUSTRIES, LTD.
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Takayuki Hattori
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Friction test apparatus
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Patent number 6,334,358
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Issue date Jan 1, 2002
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Sumitomo Rubber Industries, Ltd.
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Kiyoshige Muraoka
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G01 - MEASURING TESTING
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Offset printing method
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Patent number 5,715,754
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Issue date Feb 10, 1998
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Sumitomo Rubber Industries Ltd.
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Jun Nishibayashi
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS