4. Electric heating
  5. Metal heating
  6. By arc

Charles E. Hixon

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Beam welding process

Electric heating – Metal heating – By arc
Patent

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Method and apparatus for retaining roller cone of drill bit

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

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Rock drill bit lubricant circulating system

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – Rotation of bit actuates lubricant feed means
Patent

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Profile ID: LFUS-PAI-P-1415224

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