4. Expansible chamber devices
  5. Displacement control of plural cylinders arranged in...
  6. Predetermined discrete incremental adjustment positions

J. Wallace Johnson

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Electric pump

Expansible chamber devices – Displacement control of plural cylinders arranged in... – Predetermined discrete incremental adjustment positions
Patent

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Magnetic control device

Electricity: circuit makers and breakers – Float – Float and pressure
Patent

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Pump

Wells – Above ground apparatus – With means for inserting fluid into well
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Profile ID: LFUS-PAI-P-592309

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