with curved jibs only

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Industry

CPC
E21C25/26

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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21CMINING OR QUARRYING E21C25/00Cutting machines

Current Industry

E21C25/26with curved jibs only

Industries

Patents Grantslast 30 patents

Information Patent Grant
2755077
- Patent number 2,755,077
- Issue date Jul 17, 1956
- E21 - EARTH DRILLING MINING