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Dual function thermal valve

Automatic temperature and humidity regulation – Snap-acting – Including a permanent magnet
Patent

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Dual in-line valve construction

Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Plenum type
Patent

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Dual mode bellows-actuated thermostatic steam trap

Automatic temperature and humidity regulation – Traps – Thermostatic
Patent

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Dual mode input signal conditioner

Automatic temperature and humidity regulation – Ventilator type – Electrically actuated
Patent

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Dual reset controller

Automatic temperature and humidity regulation – Motors – Fluid-operated
Patent

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Dual-function valve with pressure adjustment and temperature...

Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Having oscillating or reciprocating valve
Reexamination Certificate

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Dual-function valve with pressure adjustment and temperature...

Automatic temperature and humidity regulation – Mixing fluid of dissimilar temperature – Having oscillating or reciprocating valve
Reexamination Certificate

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Dual-rate fuel flow control system for space heater

Automatic temperature and humidity regulation – Hot-air furnace – Air and fire control
Patent

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Duct pressure powered air volume controller

Automatic temperature and humidity regulation – Ventilator type
Patent

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Duct pressure synthesis for air distribution system

Automatic temperature and humidity regulation – Ventilator type – Electrically actuated
Patent

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Duct type air conditioning system

Automatic temperature and humidity regulation – Ventilator type
Patent

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Duty-cycle controlling thermostat construction, system utilizing

Automatic temperature and humidity regulation – With timing element – Timer other than clock
Patent

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Dynamically controlled environmental control system

Automatic temperature and humidity regulation – High and low temperature alternate
Patent

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