Einar M. Arentzen

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Charleroi, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Continuous mining machine with a chain drive for the cutting head
- Patent number 3,968,995
- Issue date Jul 13, 1976
- Dresser Industries, Inc.
- Einar M. Arentzen
- E21 - EARTH DRILLING MINING