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Earl C. Michael
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Hoyleton, IL, US
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last 30 patents
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Patent Grant
Machine operators compartment
Patent number
4,546,849
Issue date
Oct 15, 1985
National Mine Service Company
Barry R. Kelley
E21 - EARTH DRILLING MINING
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Patent Grant
Apparatus for extending and retracting the cutter bars of a boring...
Patent number
4,339,153
Issue date
Jul 13, 1982
National Mine Service Company
Maurice K. LeBegue
E21 - EARTH DRILLING MINING
Information
Patent Grant
Extensible and retraciable rotor arm cutting assembly
Patent number
4,316,635
Issue date
Feb 23, 1982
National Mine Service Company
Maurice K. LeBegue
E21 - EARTH DRILLING MINING