Yvon Charnavel

Follow

Person

Rosny-Sous-Bois, FR

People

Patents Grantslast 30 patents

Information Patent Grant
Process for hollowing out a cavity formed of a plurality of sub-cav...
- Patent number 5,988,760
- Issue date Nov 23, 1999
- GAZ de France (G.D.F.) Service National
- Jean-Gerard Durup
- E21 - EARTH DRILLING MINING
Information Patent Grant
Process for excavating a cavity in a thin salt layer
- Patent number 5,957,539
- Issue date Sep 28, 1999
- Gaz de France (G.D.F.) Service National
- Jean-Gerard Durup
- E21 - EARTH DRILLING MINING