DR

Donald E. Ritchie

DI Dresser Industries: 2 patents #157 of 787Top 20%
📍 Houston, TX: #8,651 of 21,073 inventorsTop 45%
🗺 Texas: #52,441 of 125,132 inventorsTop 45%
Overall (All Time): #2,332,220 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4852654 Wireline hydraulic isolation packer system Robert K. Buckner, Norman W. Read 1989-08-01
4688634 Running and setting tool for well packers Lee M. Lustig 1987-08-25