4. Cutting by use of rotating axially moving tool
  5. With means to apply transient, fluent medium to work or product
  6. Including tool with duct

Frank A. Hollingshead

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Drill bit

Cutting by use of rotating axially moving tool – With means to apply transient – fluent medium to work or product – Including tool with duct
Patent

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Drill bit having a thrust bearing heat sink

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

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Rolling cutter drill bit

Metal tools and implements – making – Blank or process – Drill
Patent

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Profile ID: LFUS-PAI-P-797923

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