Bernard E. Villeneuve

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Romorantin, FR

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Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for locating the position of a drill core sample
- Patent number 4,334,429
- Issue date Jun 15, 1982
- Bureau de Recherches Geologiques et Minieres
- Jean-Paul R. H. Breton
- E21 - EARTH DRILLING MINING