4. Pumps
  5. Motor driven
  6. Electric or magnetic motor

Alvin J. Watson

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Eddy current drive and motor control system for oil well pumping

Pumps – Motor driven – Electric or magnetic motor
Patent

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System and method for variable drive pump control

Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1883759

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