DJ

Douglas Jahnke

PT Premium Oilfield Technologies: 3 patents #1 of 1Top 100%
NV National Oilwell Varco: 1 patents #8 of 89Top 9%
📍 Houston, TX: #148 of 2,508 inventorsTop 6%
🗺 Texas: #1,088 of 15,368 inventorsTop 8%
Overall (2018): #46,431 of 503,207Top 10%
4
Patents 2018

Issued Patents 2018

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
10041490 Quick change cylindrical liner retainer assembly 2018-08-07
10036384 Quick release piston rod assembly 2018-07-31
9909580 Reduced torque valve cover lock assembly 2018-03-06
9869148 Wellsite connector with floating seal member and method of using same Frank Benjamin Springett, Eric Trevor Ensley 2018-01-16