Jean Poullain

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71100 Chalon-sur-Saone, FR

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Patents Grantslast 30 patents

Information Patent Grant
Process and a device for the production of grooves on a wall of rev...
- Patent number 4,838,066
- Issue date Jun 13, 1989
- Escofier Technologie, S.A.
- Charles Marcon
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Process for forming helical screw threads having a flank with zero...
- Patent number 4,799,372
- Issue date Jan 24, 1989
- Charles Marcon
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...