2 results for “Owens-Corning Fiberglas”
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Patent · November 18, 1930
Method and Apparatus for Preparing Wet Mixtures (US Patent 1,781,728, 1930)
…1930, filed October 29, 1927. The patent's description opens (from the scanned text): This invention relates to a. method of and apparatus for preparing and manipulating wet or semi-wet mixtures of niaterials, which are…
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Patent · August 8, 1939
Article of Manufacture (Blackboard) (US Patent 2,168,445, 1939)
…8, 1939, filed March 7, 1936. It was assigned to Johns Manville. The patent's description opens (from the scanned text): This invention relates to an article of manufacture, particularly to a blackboard or blackboard base.