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Cletis P. Pinkerton
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Mentor, OH, US
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Patents Grants
last 30 patents
Information
Patent Grant
Cutter bit assembly with resilient bit retainer
Patent number
4,755,003
Issue date
Jul 5, 1988
Cletis P. Pinkerton
E21 - EARTH DRILLING MINING
Information
Patent Grant
Cutter bit device
Patent number
4,684,176
Issue date
Aug 4, 1987
Leroy E. Den Besten
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Retainer system for roof-mine tool bit
Patent number
4,474,488
Issue date
Oct 2, 1984
Mining Tools Div. of Smith International, Inc.
Cletis P. Pinkerton
E21 - EARTH DRILLING MINING
Information
Patent Grant
Mining bit with improved split ring retainer
Patent number
4,462,638
Issue date
Jul 31, 1984
Leroy E. DenBesten
E21 - EARTH DRILLING MINING