4. Mining or in situ disintegration of hard material
  5. Cutter tooth or tooth head
  6. Planar type bit mount

Ernst Heiderich

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Cutting or breaking tool as well as cutting insert for the...

Cutters – for shaping – Including tool having plural alternatively usable cutting edges – With integral chip breaker – guide or deflector
Reexamination Certificate

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Cutting or breaking tool as well as cutting insert for the...

Cutters – for shaping – Including tool having plural alternatively usable cutting edges – With integral chip breaker – guide or deflector
Reexamination Certificate

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Cylindrical cutting device

Cutters – for shaping – Rotary cutting tool – Including holder having seat for inserted tool
Reexamination Certificate

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Pick system for mining ploughs, in particular coal ploughs

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

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Roller bit for tunnel-driving machines with segmented...

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

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