Roctest Ltee/Ltd.

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St. Lambert, CA

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Patents Grantslast 30 patents

Information Patent Grant
Borehole extensometer for monitoring relative mass displacements
- Patent number 4,719,803
- Issue date Jan 19, 1988
- Roctest Ltee/Ltd.
- Jean-Francois Capelle
- E21 - EARTH DRILLING MINING