WK

Wouter Johannes Gregorius Keultjes

Shell Oil Compny: 1 patents #2,223 of 4,423Top 55%
Overall (All Time): #3,601,847 of 4,157,543Top 90%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6327539 Method of determining drill string stiffness Leon Van Den Steen 2001-12-04