4. Pumps
  5. Condition responsive control of pump drive motor
  6. Responsive to accumulation of pumped liquid in receiver

Metropolitan Industries, Inc.

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Current and voltage probe for measuring harmonic distortion

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Patent

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Current and voltage probe for measuring harmonic distortion

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Patent

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DC pump control system

Electricity: battery or capacitor charging or discharging – Battery or cell discharging – With charging
Reexamination Certificate

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DC/DC boost converter with bypass circuitry

Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate

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Density sensing, solid state, pump switching system

Electricity: motive power systems – Automatic and/or with time-delay means – Level of fluid or granular material
Reexamination Certificate

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