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