Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4270775 | Device for sealing the place of penetration of a pipeline in the wall of a submerged structure | John Stanfield, Paal Pettersen | 1981-06-02 |
| 4208055 | Method and device for sealing the place of penetration of a pipeline in the wall of a submerged structure | John Stanfield, Paal Pettersen | 1980-06-17 |