4. Wells
  5. With eduction pump or plunger

John Birckhead

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Annular shaped interrupted solenoid activator and pump for...

Wells – With eduction pump or plunger
Reexamination Certificate

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One shot valve for operating down-hole well working and...

Fluid handling – Destructible or deformable element controlled – Heat destructible or fusible
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2450111

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