2 results for “General Electric”
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Patent · July 24, 1928
Millboard Product and Process (US Patent 1,678,345, 1928)
…24, 1928, filed June 25, 1921. The patent's description opens (from the scanned text): This invention relates to artificial prod ucts of the general character of millboard, draulic cement, fibrous material and one or. more…
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Patent · July 24, 1928
Millboard Product and Process (US Patent 1,678,346, 1928)
…346 on July 24, 1928, filed February 12, 1924. The patent's description opens (from the scanned text): This invention relates to artificial products of the general character of millboard, wall board, roofings, and the like…