Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800752 | Flow restricting logging tool and method | — | 1989-01-31 |
GP
George E. Piers
Overall (1989): #111,463 of 140,708Top 80%
1
Patents 1989