Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5692250 | Vacuum toilet system with treated rinse liquid | Gary L. Stahl, Paul L. Dubler, Lars Erik A. E. Glas, Anders G. Ostman | 1997-12-02 |
| 5454936 | Vacuum toilet system | Arne Ask, Harald A. A. Wallgren, Raymond L. Wilhelm | 1995-10-03 |
| 5421040 | Vacuum toilet system | — | 1995-06-06 |
| 5245711 | Vacuum toilet system | Gary L. Stahl, Björn Still | 1993-09-21 |
| 5165457 | Vacuum sewer arrangement | Henry Olin, Gunnar Lindroos | 1992-11-24 |
| 5007117 | Vacuum toilet system with simultaneous rinse and discharge | Gary L. Stahl | 1991-04-16 |
| 5002592 | Waste tank for a vacuum sewage system | Lennart Stroby, Ake Nilsson, Arne Ask, Gary L. Stahl, Paul L. Dubler | 1991-03-26 |
| 4928326 | Vacuum sewer arrangement | Henry Olin, Gunnar Lindroos | 1990-05-29 |
| 4713847 | Vacuum toilet system | Sigvard V. Soderstrom | 1987-12-22 |
| 4704047 | Land drainage system | Tage Fridolfsson | 1987-11-03 |
| 4246925 | Waste water vacuum conveyance method and apparatus | — | 1981-01-27 |