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• Decade: 1930s ×
• Written by: Joseph Berg ×
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1 result for “Owens-Illinois”

1. Patent · November 4, 1930

   Insulating Block (US Patent 1,780,739, 1930)

   …filed April 12, 1930. The patent's description opens (from the scanned text): This invention relates to an insulating block to be used for walls of refrlgerating units, buildings where temperature preserv- I ing qualities are…