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Jean-Michel Claude Gaston Savignat
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Rijswijk, NL
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last 30 patents
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Patent Grant
Drill bit with protection member
Patent number
7,467,671
Issue date
Dec 23, 2008
Shell Oil Company
Jean-Michel Claude Gaston Savignat
E21 - EARTH DRILLING MINING
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Patent Grant
Drill bit and system for drilling a borehole
Patent number
7,464,774
Issue date
Dec 16, 2008
Shell Oil Company
Jean-Michel Claude Gaston Savignat
E21 - EARTH DRILLING MINING