Douglas Jahnke

PT Premium Oilfield Technologies: 2 patents #1 of 1Top 100%

NV National Oilwell Varco: 1 patents #6 of 44Top 15%

📍 Houston, TX: #283 of 2,948 inventorsTop 10%

🗺 Texas: #1,940 of 17,606 inventorsTop 15%

Overall (2019): #92,329 of 560,194Top 20%

Patents 2019

Issued Patents 2019

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
RE47771	Blowout preventer with locking ram assembly and method of using same	—	2019-12-17
10436193	Cylinder liner retainer system with torque multiplier and method	—	2019-10-08
10408328	Epicyclic washpipe swivel cartridge and method	—	2019-09-10