Roger Masse

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Thetford Mines, Quebec, CA

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Patents Grantslast 30 patents

Information Patent Grant
Impact hammer assembly for drilling rock
- Patent number 4,840,235
- Issue date Jun 20, 1989
- Roger Masse
- E21 - EARTH DRILLING MINING
Information Patent Grant
Drill bit
- Patent number 4,762,188
- Issue date Aug 9, 1988
- Roger Masse
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method and apparatus for drilling hard material
- Patent number 4,682,819
- Issue date Jul 28, 1987
- Roger Masse
- E21 - EARTH DRILLING MINING