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Jean Demoulin
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Ippling, FR
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last 30 patents
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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