Norbert Kholer

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Saint Germain en Laye, FR

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Patents Grantslast 30 patents

Information Patent Grant
Process for preventing water inflow in an oil- and/or gas-producing...
- Patent number 4,718,491
- Issue date Jan 12, 1988
- Institut Francais du Petrole
- Norbert Kholer
- E21 - EARTH DRILLING MINING