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| US6804919 | 23 Sep 2002 | 19 Oct 2004 | Building Materials Investment Corporation | Backer for tabbed composite shingles | | US7743573 | 5 May 2008 | 29 Jun 2010 | Engineering Innovations, LLC | Roofing composition | | US8065854 | 26 May 2010 | 29 Nov 2011 | Engineering Innovations, LLC | Roofing composition |
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