Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5188173 | Pressure control system and cable guiding device for use in drilling wells | David L. Richardson, Robert Grubba, Timothy P. McLaughlin | 1993-02-23 |
DP
David B. Parran
Overall (All Time): #3,817,783 of 4,157,543Top 95%
1
Patents All Time