Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4713847 | Vacuum toilet system | Sven Oldfelt | 1987-12-22 |
| 4511117 | Activating apparatus in a liquid conveying system operated by vacuum, preferably a so-called vacuum sewage system | — | 1985-04-16 |
| 4280528 | Waste water conveyance apparatus | — | 1981-07-28 |