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Double rustproof PC strand
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Patent number 8,833,050
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Issue date Sep 16, 2014
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Kurosawa Construction Co., Ltd.
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Ryohei Kurosawa
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D07 - ROPES CABLES OTHER THAN ELECTRIC
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2317113
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Patent number 2,317,113
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Issue date Apr 20, 1943
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D07 - ROPES CABLES OTHER THAN ELECTRIC
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2171993
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Patent number 2,171,993
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Issue date Sep 5, 1939
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D07 - ROPES CABLES OTHER THAN ELECTRIC