4. Boring or penetrating the earth
  5. Below-ground impact members
  6. With releasable means to detachably retain telescoping...

Roland George Harper, Jr.

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Apparatus for handling pipe at well site

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

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Derrick mounted apparatus for the manipulation of pipe

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

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Tubing spreader mechanism

Wells – Above ground apparatus – With assembly or disassembly means
Patent

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Profile ID: LFUS-PAI-P-950748

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