4. Measuring and testing
  5. Volume or rate of flow
  6. By measuring vibrations or acoustic energy

National Environmental Products Ltd., Inc.

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Emergency capacitive energy source and circuit for damper motors

Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent

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Foam, drain and fill control system for humidifier

Electric resistance heating devices – Heating devices – Vaporizer
Patent

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Microprocessor-based controller for actuator motors with capacit

Electricity: motive power systems – Positional servo systems – With protective or reliability increasing features
Patent

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Ultrasound air velocity detector for HVAC ducts and method there

Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent

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