Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5002592 | Waste tank for a vacuum sewage system | Ake Nilsson, Arne Ask, Gary L. Stahl, Sven Oldfelt, Paul L. Dubler | 1991-03-26 |
| 4865631 | Vacuum sewage system | Ake Nilsson, Arne Ask | 1989-09-12 |