Dorice Vrignaud

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La Roche sur Yon, FR

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Patents Grantslast 30 patents

Information Patent Grant
Press tool comprising interchangeable working parts
- Patent number 4,718,161
- Issue date Jan 12, 1988
- Essweing S.A.
- Jean M. Pfister
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Press tool provided with a system for guiding and relieving a metal...
- Patent number 4,704,890
- Issue date Nov 10, 1987
- Esswein, S.A.
- Dorice Vrignaud
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Metal stamping tool with working parts removable while on the machine
- Patent number 4,656,902
- Issue date Apr 14, 1987
- Esswein S.A.
- Dorice Vrignaud
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...