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US5913288A
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Dual drum boiler
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US5799621A
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Boiler assembly
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US4838210A
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Pre-formed insulating reversing chamber for modified scotch boiler or the like
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US4162686A
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Industrial boiler utilizing multiple fuels and having reduced particulate emission and method of combustion
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US3914913A
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Snap interlock deck structure with improved interlocking engagement
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US3999346A
|
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Snap interlock deck structure
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US3705784A
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Liquid fuel burner having reduced thermal stress and rapid start-up time
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US3632284A
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Burner
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US3589348A
|
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Spark plug and heated adaptor therefor
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US3173228A
|
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Gable glazing bar cap
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US3135845A
|
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Weight operated overload motor control for ventilating systems
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US2481989A
|
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Motor control
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US2519239A
|
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Thermostatic control
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US2458455A
|
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Greenhouse construction
|
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US2491271A
|
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Greenhouse bench
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CA459444A
|
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Greenhouse construction
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CA569639A
|
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Baseboard air distributing duct
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CA459443A
|
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Thermostatic control
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