allowing the bending into at least two planes

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Patents Grantslast 30 patents

Information Patent Grant
2872826
- Patent number 2,872,826
- Issue date Feb 10, 1959
- E21 - EARTH DRILLING MINING
Information Patent Grant
2865621
- Patent number 2,865,621
- Issue date Dec 23, 1958
- E21 - EARTH DRILLING MINING
Information Patent Grant
2778236
- Patent number 2,778,236
- Issue date Jan 22, 1957
- E21 - EARTH DRILLING MINING
Information Patent Grant
2773394
- Patent number 2,773,394
- Issue date Dec 11, 1956
- E21 - EARTH DRILLING MINING
Information Patent Grant
2733905
- Patent number 2,733,905
- Issue date Feb 7, 1956
- E21 - EARTH DRILLING MINING
Information Patent Grant
2733906
- Patent number 2,733,906
- Issue date Feb 7, 1956
- E21 - EARTH DRILLING MINING
Information Patent Grant
2675219
- Patent number 2,675,219
- Issue date Apr 13, 1954
- E21 - EARTH DRILLING MINING
Information Patent Grant
2566675
- Patent number 2,566,675
- Issue date Sep 4, 1951
- E21 - EARTH DRILLING MINING
Information Patent Grant
1782408
- Patent number 1,782,408
- Issue date Nov 25, 1930
- E21 - EARTH DRILLING MINING