Jean J. Fery

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Bar Le Duc, FR

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Patents Grantslast 30 patents

Information Patent Grant
Procedure and cell for measuring coefficients of adhesion and frict...
- Patent number 5,052,219
- Issue date Oct 1, 1991
- Total Compagnie Francaise des Petroles
- Jean-Jacques Fery
- E21 - EARTH DRILLING MINING
Information Patent Grant
Method of tracing a well drilling mud
- Patent number 4,352,674
- Issue date Oct 5, 1982
- Compagnie Francaise des Petroles
- Jean J. Fery
- E21 - EARTH DRILLING MINING