J. Pierre Ravier

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Quetigny, FR

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Patents Grantslast 30 patents

Information Patent Grant
Staged tool for boring a hole in an element by axial penetration of...
- Patent number 4,966,023
- Issue date Oct 30, 1990
- Agence Regionale de Developpements Technologiques
- Robert Prunier
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...