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Eugene R. Smarrella
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Shinnston, WV, US
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last 30 patents
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Patent Grant
Method and apparatus for roof drilling
Patent number
4,086,972
Issue date
May 2, 1978
Carmet Company
Lloyd B. Hansen
E21 - EARTH DRILLING MINING
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Patent Grant
Method of roof drilling
Patent number
4,019,590
Issue date
Apr 26, 1977
Carmet Company
Lloyd B. Hansen
E21 - EARTH DRILLING MINING
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Patent Grant
Apparatus for roof drilling
Patent number
4,009,760
Issue date
Mar 1, 1977
Carmet Company
Lloyd B. Hansen
E21 - EARTH DRILLING MINING