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• Written by: William W. Bainbridge ×
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1 result for “Owens-Illinois”

1. Patent · February 3, 1942

   Roofing Element (US Patent 2,271,728, 1942)

   …It was assigned to United States Gypsum Co. The patent's description opens (from the scanned text): This invention relates to a roofing shingle and has for an object the provision of a rigid roong element…