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Roofing systems and methods
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Patent number 10,087,634
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Issue date Oct 2, 2018
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Johns Manville
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Walter Alexander Johnson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Roofing systems and methods
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Patent number 9,909,317
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Issue date Mar 6, 2018
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Johns Manville
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Walter Alexander Johnson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Roofing systems and methods
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Patent number 9,404,261
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Issue date Aug 2, 2016
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Johns Manville
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Walter Alexander Johnson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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