4. Wells
  5. Processes
  6. Producing the well

Dana Robert Pettigrew

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System for, and a method of pumping fluids from a well

Wells – Processes – Producing the well
Reexamination Certificate

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Variable frequency power system and method of use

Electricity: single generator systems – Automatic control of generator or driving means – Speed or frequency of generator
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2804211

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