Jean Ehrsam

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Clamart, FR

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Patents Grantslast 30 patents

Information Patent Grant
Method of constructing a rail track on a track-receiving concrete slab
- Patent number 6,752,322
- Issue date Jun 22, 2004
- Alstom
- Jean Ehrsam
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
GUIDE METHOD FOR GUIDING A DEVICE THAT IS DESIGNED TO INSERT ELEMEN...
- Patent number 6,505,406
- Issue date Jan 14, 2003
- Alstom
- Ian Robertson
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Patents Applicationslast 30 patents

Information Patent Application
Method of constructing a rail track on a track-receiving concrete slab
- Publication number 20030178500
- Publication date Sep 25, 2003
- ALSTOM
- Jean Ehrsam
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Application
Guide method for guiding a device that is designed to insert elemen...
- Publication number 20020014015
- Publication date Feb 7, 2002
- ALSTOM
- Ian Robertson
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES