4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Carl Rowold

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AC motorized wheel arrangement

Motor vehicles – Power – Electric
Patent

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Combination drag and roller cutter drill bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Diffuser for aeration basin

Gas and liquid contact apparatus – Fluid distribution – Valved
Patent

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Downhole cyclonic separator assembly

Liquid purification or separation – Tangential flow or centrifugal fluid action – Multiple cyclone
Patent

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Drill bit having a flush-out port

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Profile ID: LFUS-PAI-P-233486

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