Jean-Jacques Boyer

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Montchauvet (Yvelines), FR

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Patents Grantslast 30 patents

Information Patent Grant
Railroad lifting device for ballast cleaning and levelling machines
- Patent number 4,136,618
- Issue date Jan 30, 1979
- Jean-Jacques Boyer
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Ballast cleaning and levelling machine
- Patent number 4,133,388
- Issue date Jan 9, 1979
- Jean-Jacques Boyer
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Information Patent Grant
Apparatus for removing, cleaning and replacing railroad ballast
- Patent number 4,042,035
- Issue date Aug 16, 1977
- Societe Anonyme Secmafer
- Jean Jacques Boyer
- E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES