William E. McCracken

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Mining apparatus and method
- Patent number 4,328,994
- Issue date May 11, 1982
- Lee-Norse Company
- Gary A. Hakes
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mining and bolting method and apparatus
- Patent number 4,310,197
- Issue date Jan 12, 1982
- Lee-Norse Company
- William E. McCracken
- E21 - EARTH DRILLING MINING