Michel Jehan

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La Flamengrie, FR

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Patents Grantslast 30 patents

Information Patent Grant
Manufacture of a composite tubular product
- Patent number 4,486,227
- Issue date Dec 4, 1984
- Vallourec
- Michel Douchy
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Manufacture of a composite tubular product
- Patent number 4,364,770
- Issue date Dec 21, 1982
- Vallourec
- Michel Douchy
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR