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1960-01-05
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1976-01-20
Magnetically-controlled gas ignition system
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1966-08-30
Gas furnace control system
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1900-01-01
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1949-09-20
Heater control system
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1962-11-06
Electrical control system for gas burner assemblies
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1938-11-15
Control system for gas heaters
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1981-01-06
Direct ignition gas burner control system
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1945-02-27
Burner control apparatus
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1977-07-13
Control device for igniting and monitoring a flame-fired furnace
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1967-08-09
Burner control system
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1942-01-13
Burner control system
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1940-01-02
Control apparatus
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1937-04-20
System of control for liquid fuel burners
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1956-10-30
Burner primary control
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1940-01-02
Control apparatus
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1959-04-21
Ignition and control system for gas burners
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1996-07-20
Устройство запуска подогревателя
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1957-04-16
Automatic electric ignition for oil burners
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1951-09-25
Burner system, including ignition controlling means
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1933-03-21
And cliffobd hotchxiss
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1995-04-04
Control system for gas fired heating apparatus using double-throw radiant heat sensing switch
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1985-06-27
温風暖房機の制御回路
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1934-04-03
Control apparatus
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1941-02-25
Safety feature for control systems