4. Mining or in situ disintegration of hard material
  5. Cutter tooth or tooth head

Stephen P. Stiffler

Inventor

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Butterfly-type shim having semi-opened bottom and double sandwic

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Patent

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Cemented carbide tip

Mining or in situ disintegration of hard material – Cutter tooth or tooth head
Patent

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Cemented carbide tip

Mining or in situ disintegration of hard material – Cutter tooth or tooth head
Patent

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Cutter bit and tip

Mining or in situ disintegration of hard material – Miscellaneous
Patent

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Cutting tool retainer

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Rolling or rotatable-type bit mount
Reexamination Certificate

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Profile ID: LFUS-PAI-P-199804

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