Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4416332 | Method for increasing the pressure in oil-bearing geological structures | Lars I. Wiberger, Peter Ronnow, Bert G. H. Hellman | 1983-11-22 |
| 4300632 | Method for increasing the pressure in oil-bearing geological structures | Lars I. Wiberger, Peter Ronnow, Bert G. H. Hellman | 1981-11-17 |