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• Written by: Theodore E. Knowlton ×
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1 result for “Owens-Corning Fiberglas”

1. Patent · February 5, 1929

   Wallboard (US Patent 1,701,454, 1929)

   …E. Knowlton received US Patent No. 1,701,454 on February 5, 1929, filed September 14, 1925. The patent's description opens (from the scanned text): This invention relates to wallboard known generally as plaster board.