4. Cutting by use of rotating axially moving tool
  5. Tool or tool with support
  6. Having axial, core-receiving central portion

Hawera Probst GmbH

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Annular bit having a center drill

Cutting by use of rotating axially moving tool – Tool or tool with support – With work-engaging structure detachable from cutting edge
Patent

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Drill bit for the rotary-percussive drilling of preferably rock,

Boring or penetrating the earth – Bit or bit element – With helical-conveying portion
Patent

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Drill bit tube

Cutting by use of rotating axially moving tool – Tool or tool with support – Having axial – core-receiving central portion
Patent

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Drilling tool

Boring or penetrating the earth – Bit or bit element – Impact or percussion type
Reexamination Certificate

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Drilling tool

Cutting by use of rotating axially moving tool – Tool or tool with support – Having stepped cutting edges
Reexamination Certificate

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Profile ID: LFUS-PAI-P-196108

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