Robert L. Morris

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Painesville, OH, US

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Patents Grantslast 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
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