Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886129 | Well drilling operation control procedure | — | 1989-12-12 |
JB
Jean-Claude BOURDON
Overall (1989): #98,469 of 140,708Top 70%
1
Patents 1989