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Optical fiber cable
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Patent number 6,411,761
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Issue date Jun 25, 2002
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Sumitomo Electric Industries, Ltd.
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Tomoyuki Yokokawa
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G02 - OPTICS
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Optical fiber cable
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Patent number 6,229,944
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Issue date May 8, 2001
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Sumitomo Electric Industries, Ltd.
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Tomoyuki Yokokawa
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G02 - OPTICS
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Optical cable
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Patent number 6,212,321
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Issue date Apr 3, 2001
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Sumitomo Electric Industries, Ltd.
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Hiroki Ishikawa
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G02 - OPTICS
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Optical fiber cable
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Patent number 6,208,785
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Issue date Mar 27, 2001
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Sumitomo Electric Industries, Ltd.
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Hiroki Ishikawa
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G02 - OPTICS
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Dispersion-shifted fiber
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Patent number 5,852,701
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Issue date Dec 22, 1998
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Sumitomo Electric Industries, Ltd.
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Takatoshi Kato
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G02 - OPTICS
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Dispersion-shifted fiber
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Patent number 5,721,800
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Issue date Feb 24, 1998
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Sumitomo Electric Industries, Ltd.
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Takatoshi Kato
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G02 - OPTICS