by electromagnets

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Patents Grantslast 30 patents

Information Patent Grant
Electromagnetic percussion appliance
- Patent number 4,215,297
- Issue date Jul 29, 1980
- Georges Jacquemet
- B25 - HAND TOOLS PORTABLE POWER-DRIVEN TOOLS MANIPULATORS
Information Patent Grant
2635854
- Patent number 2,635,854
- Issue date Apr 21, 1953
- E21 - EARTH DRILLING MINING
Information Patent Grant
1847085
- Patent number 1,847,085
- Issue date Mar 1, 1932
- E21 - EARTH DRILLING MINING
Information Patent Grant
1518384
- Patent number 1,518,384
- Issue date Dec 9, 1924
- E21 - EARTH DRILLING MINING
Information Patent Grant
1515497
- Patent number 1,515,497
- Issue date Nov 11, 1924
- E21 - EARTH DRILLING MINING