John Engels

Schlumberger Technology: 1 patents #3,893 of 7,293Top 55%

Diemelstraße, TX: #689 of 1,115 inventorsTop 65%

Texas: #73,555 of 125,132 inventorsTop 60%

Overall (All Time): #3,351,941 of 4,157,543Top 85%

1 Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
7350572	Methods for controlling fluid loss	Christopher N. Fredd, Bernhard Lungwitz, Brad Holms	2008-04-01