Robert L. Hurd

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Lexington, KY, US

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Patents Grantslast 30 patents

Information Patent Grant
Chain driven cutting bucket for use in deep mining
- Patent number 4,234,233
- Issue date Nov 18, 1980
- Robert L. Hurd
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for deep mining using chain driven in fixed di...
- Patent number 4,232,904
- Issue date Nov 11, 1980
- Robert L. Hurd
- B28 - WORKING CEMENT, CLAY, OR STONE