1 result for “Owens-Corning Fiberglas”
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Patent · August 28, 1923
Fireproof Wallboard (US Patent 1,466,246, 1923)
…Parkyn received US Patent No. 1,466,246 on August 28, 1923, filed October 13, 1920. The patent's description opens (from the scanned text): The invention relates to wall board composed principally of fibrous material.