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Optical device
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Patent number 5,135,791
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Issue date Aug 4, 1992
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Sumitomo Chemical Company, Limited
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Shozaburo Imai
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Coating composition
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Patent number 4,978,702
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Issue date Dec 18, 1990
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Sumitomo Chemical Company, Limited
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Masahiro Yuyama
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Process for preparing methacrylate polymer
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Patent number 4,717,756
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Issue date Jan 5, 1988
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Sumitomo Chemical Company, Limited
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Yasuyuki Kato
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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