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• Decade: 1960s ×
• Written by: Norman P. Harshberger ×
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1 result for “Owens-Illinois”

1. Patent · March 7, 1967

   Roofing product and method of application (US Patent 3,307,989, 1967)

   …1967, filed June 15, 1964. The patent's description opens: This invention is directed to the protection of old worn sand or gravel surfaced roofs, the prevention of shedding of the surface, thereof by having the…