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1 result for “Owens-Corning Fiberglas”

1. Patent · July 31, 1928

   Waterproof Heat Insulation (US Patent 1,678,659, 1928)

   …filed June 7, 1924. The patent's description opens (from the scanned text): This invention relates to improvements in the waterproofing of porous heat insulating materials of a fibrous nature, such for-example as magnesia pipe…