DJ

D. Peter Johnson

Schlumberger Technology: 1 patents #221 of 860Top 30%
Overall (2021): #488,632 of 548,734Top 90%
1
Patents 2021

Issued Patents 2021

Patent #TitleCo-InventorsDate
10947814 Pilot controlled actuation valve system Edward George Parkin, Michael Pearce, Julien Steimetz, Jonathan Marshall, Clint William Philbrick 2021-03-16