4. Electricity: motive power systems
  5. Having rotor element biased against rotation

Douglas S. McIntosh

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Control valves for heating and cooling systems

Valves and valve actuation – Electrically actuated valve – Rotary electric actuator
Reexamination Certificate

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Mechanical return fail-safe actuator for damper, valve, elevator

Electricity: motive power systems – Having rotor element biased against rotation
Patent

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Modulating fluid control device

Automatic temperature and humidity regulation – Heating radiator – Combined radiator and apartment controlled
Patent

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Spring assisted electric/electronic globe control valve

Valves and valve actuation – Reciprocating valve – Push or pull operator
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1274149

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