Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856592 | Annulus cementing and washout systems for wells | Ian F. Milne | 1989-08-15 |
| 4794988 | Surface wellhead | — | 1989-01-03 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4856592 | Annulus cementing and washout systems for wells | Ian F. Milne | 1989-08-15 |
| 4794988 | Surface wellhead | — | 1989-01-03 |