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Optical glass fiber
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Patent number 6,004,675
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Issue date Dec 21, 1999
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Sumitomo Electric Industries, Ltd.
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Nobuhiro Akasaka
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C03 - GLASS MINERAL OR SLAG WOOL
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Coated optical fiber
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Patent number 5,835,656
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Issue date Nov 10, 1998
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Sumitomo Electric Industries, Ltd.
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Kazumasa Oishi
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G02 - OPTICS
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Communication line material
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Patent number 5,562,985
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Issue date Oct 8, 1996
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Sumitomo Electric Industries, Ltd.
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Hiroaki Sano
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G02 - OPTICS
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Communication line material
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Patent number 5,441,813
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Issue date Aug 15, 1995
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Sumitomo Electric Industries, Ltd.
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Hiroaki Sano
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G02 - OPTICS
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Insulated electric wire
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Patent number 5,192,834
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Issue date Mar 9, 1993
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Sumitomo Electric Industries, Ltd.
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Toru Yamanishi
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H01 - BASIC ELECTRIC ELEMENTS
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Resin composite
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Patent number 4,799,762
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Issue date Jan 24, 1989
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Sumitomo Electric Industries, Ltd.
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Tatsuya Kakuta
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...