4. Communications: electrical
  5. Condition responsive indicating system
  6. Specific condition

Harry D. Hebard

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Drill pipe spinner

Tools – Wrench – screwdriver – or driver therefor – Machine
Patent

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Interference warning device

Communications: electrical – Condition responsive indicating system – Specific condition
Patent

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Stand jumping and stabbing guide device and method

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Well head seal assembly

Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate – Nipple threaded to plate
Patent

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Profile ID: LFUS-PAI-P-978834

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