4. Apparel
  5. Guard or protector
  6. For wearer's head

Walter Fred

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Accessory to hard hat attaching means

Apparel – Guard or protector – For wearer's head
Patent

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Apparatus for making and breaking screw couplings

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

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Auxiliary controlled valve disposed in a drilling string

Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent

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Compensation device for insertion in a drill string for deep-wel

Boring or penetrating the earth – Below-ground impact members – With releasable means to detachably retain telescoping...
Patent

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Device for delivering flowable material

Wells – With eduction pump or plunger – Having liquid-gas separator
Patent

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Profile ID: LFUS-PAI-P-1439

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