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US2751156A
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Hot water heating system
|
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US2851222A
|
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Heating control systems
|
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US2790606A
|
|
Method for expelling air from a closed hot water system
|
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US2700956A
|
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Chicken brooder
|
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US2697813A
|
|
Magnetic amplifier system
|
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US2614242A
|
|
Reactor-controlled electronic circuit
|
|
US2554945A
|
|
Heat-regulating system
|
|
US2477729A
|
|
Electromagnetic motor control system
|
|
GB640459A
|
|
Improvements in panel structures for concealing air-conditioning heating or cooling conduits
|
|
US2584856A
|
|
Electromagnetic system
|
|
US2459069A
|
|
Electromagnetic system
|
|
US2547933A
|
|
Automatic temperature control system
|
|
US2477728A
|
|
Automatic temperature control system
|
|
US2487257A
|
|
Method of expanding containers by freezing liquid therein
|
|
GB614290A
|
|
Improvements in or relating to method and apparatus for expanding tubing and resulting products
|
|
US2487287A
|
|
Radiator enclosure
|
|
US2501147A
|
|
Radiator bracket
|
|
US2450203A
|
|
Radiator fin construction
|
|
US2482595A
|
|
Radiator construction
|
|
US2454357A
|
|
Finned radiator construction
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