73225255
Jul 30, 1979
May 17, 1983
Modifying Foodstuff Carrying Containers and Transportation Vehicles for Such Foodstuffs to Make Them Gas-Tight
Building Construction and RepairProviding an Environmental Atmosphere by the Adding of Gases to Food Stuff Carrying Containers and Modified Transportation Vehicles for the Preservation of the Foodstuffs Contained Therein
Treatment of Materials