73317998
Jul 7, 1981
Oct 18, 1983
Steam, Oil and Water Valves, All Being Parts of Machines; and Electric Motors for Operating Such Valves
MachineryAutomatic Temperature Regulators, Electric Switches, Electric Contactors, Thermostats; Timing and Control Apparatus for Central Heating Installations; Valves for Regulating and Controlling the Flow of Gas; Apparatus for Igniting the Burners of Gas Operated Heating Systems and for Regulating the Supply of Fuel to Such Burners; Apparatus for Regulating and Controlling the Heating Elements of Electric Cooking and Heating Apparatus
Electrical and Scientific Apparatus