Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11767459 | Low density oil-based wellbore fluids and methods thereof | Roger Daniloff, Nicholas Hilbig, Jerome Pic | 2023-09-26 |
| 5454936 | Vacuum toilet system | Sven Oldfelt, Harald A. A. Wallgren, Raymond L. Wilhelm | 1995-10-03 |
| 5002592 | Waste tank for a vacuum sewage system | Lennart Stroby, Ake Nilsson, Gary L. Stahl, Sven Oldfelt, Paul L. Dubler | 1991-03-26 |
| 4865631 | Vacuum sewage system | Lennart Stroby, Ake Nilsson | 1989-09-12 |