Baughman; Ray M.

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Dubois, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Mining by insertion of cutting modules into shaft for connection an...
- Patent number 4,061,399
- Issue date Dec 6, 1977
- Baughman; Ray M.
- Rodney L. Nelson
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining method and apparatus
- Patent number 4,053,182
- Issue date Oct 11, 1977
- Baughman; Ray M.
- Rodney L. Nelson
- E21 - EARTH DRILLING MINING

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