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• Decade: 1920s ×
• Written by: Robert S. Blair ×
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1 result for “Owens-Illinois”

1. Patent · April 8, 1924

   Heat Insulation and process of making same (US Patent 1,489,340, 1924)

   …1921. The patent's description opens (from the scanned text): This invention relates to heat insulating material and more particularly to blocks of such material used as insulation for appliances which are to be kept at…