JE

John Engels

Schlumberger Technology: 1 patents #3,893 of 7,293Top 55%
Overall (All Time): #3,351,941 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7350572 Methods for controlling fluid loss Christopher N. Fredd, Bernhard Lungwitz, Brad Holms 2008-04-01