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

Gary R. Johnson

E - Fixed Constructions – 21 – B

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Inventor

Country: United States Of America

Drilling apparatus with dual pipe and cross-over

E - Fixed Constructions – 21 – B
Patent

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Dual concentric pipe joint

E - Fixed Constructions – 21 – B
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Enlarged bore hole drilling apparatus

E - Fixed Constructions – 21 – B
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Enlarged bore hole drilling method

E - Fixed Constructions – 21 – B
Patent

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Enlarged bore hole drilling method and apparatus

E - Fixed Constructions – 21 – B
Patent

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Formatting printed and electronic text for smoother reading

B - Operations – Transporting – 42 – D
Patent

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Profile ID: LFCA-PAI-P-14548

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