Jean Demoulin

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Ippling, FR

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Patents Grantslast 30 patents

Information Patent Grant
Rotary cutter with spray nozzles for removal of ores from mine faces
- Patent number 4,668,018
- Issue date May 26, 1987
- Charbonnages de France
- Jean Demoulin
- E21 - EARTH DRILLING MINING
Information Patent Grant
Sectorial sprinkling device for coal mining
- Patent number 4,660,892
- Issue date Apr 28, 1987
- Charbonnages de France
- Jean J. Demoulin
- E21 - EARTH DRILLING MINING
Information Patent Grant
Rotary cutter for gouging out ore from mine faces
- Patent number 4,647,112
- Issue date Mar 3, 1987
- Charbonnages de France
- Jean Demoulin
- E21 - EARTH DRILLING MINING