4. E - Fixed Constructions
  5. 21
  6. B

Leonard Mason

E - Fixed Constructions – 21 – B

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Drilling string shock-absorbing tool

E - Fixed Constructions – 21 – B
Patent

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Drilling string shock-absorbing tool

C - Chemistry – Metallurgy – 10 – M
Patent

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Drilling string shock-absorbing tool

E - Fixed Constructions – 21 – B
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Jarring and bumping tool for use in oilfield drilling strings

E - Fixed Constructions – 21 – B
Patent

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Jarring and bumping tool for use in oilfield drilling strings

E - Fixed Constructions – 21 – B
Patent

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Valve sleeve for use in association with oilfield hydraulic...

E - Fixed Constructions – 21 – B
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Profile ID: LFCA-PAI-P-46400

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