Robin W. Hughes

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Weston, Ontario, CA

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Patents Grantslast 30 patents

Information Patent Grant
Borehole dilatometer with intensifier
- Patent number 4,760,741
- Issue date Aug 2, 1988
- Robert Koopmans
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Borehole dilatometer intensifier
- Patent number 4,733,568
- Issue date Mar 29, 1988
- Robert Koopmans
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Hydraulic rock breaking tool
- Patent number 4,657,306
- Issue date Apr 14, 1987
- Robert Koopmans
- E21 - EARTH DRILLING MINING