4. Boring or penetrating the earth
  5. With tool shaft detail
  6. Helix or helically arranged structure

Harley G. Pyles

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Drill rod and drilling apparatus

Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Patent

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Rotary percussion drill

Tool driving or impacting – Work cleansing – Cleansing fluid passage through hammer head
Patent

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Variable discharge surge feeder and bolter

Conveyors: power-driven – Conveyor system for arranging or rearranging stream of items – By laterally or vertically moving successive items in...
Patent

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Profile ID: LFUS-PAI-P-635816

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