|
US2443911A
|
|
Air heater and circulator
|
|
US2407941A
|
|
Boiler
|
|
US2455306A
|
|
Thermally responsive unit
|
|
US2443910A
|
|
Movable deflector plate for furnaces
|
|
US2444825A
|
|
Heat exchange element
|
|
US2415560A
|
|
Rivet with fluid expander therein
|
|
US2465155A
|
|
Gas burner
|
|
US2453913A
|
|
Radial flow forced-air heater
|
|
US2453912A
|
|
Volute type air-heating furnace and blower
|
|
US2378220A
|
|
Fire pot
|
|
US2349484A
|
|
Pilot valve
|
|
US2362247A
|
|
Burner control
|
|
US2400352A
|
|
Gravity furnace
|
|
US2324540A
|
|
Forced air heater
|
|
US2384797A
|
|
Gas igniter
|
|
US2361545A
|
|
Forced air furnace
|
|
US2290963A
|
|
Thermal responsive device
|
|
US2374459A
|
|
Burner control
|
|
US2310026A
|
|
Thermopile
|
|
US2362272A
|
|
Lighter
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