TREA

Cutting crowns or other tools

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Industry

  • CPC
  • E21C25/04
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C25/00Cutting machines

Current Industry

E21C25/04Cutting crowns or other tools
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    3830321
    • Patent number 3,830,321
    • Issue date Aug 20, 1974
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents