Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6397407 | Vacuum toilet system with single pump | — | 2002-06-04 |
| 6374431 | Vacuum toilet system with single pump | — | 2002-04-23 |
| 4624416 | Procedure for classifying a crystal mixture or concentrating rocks or mixed crystals in particle form | Urho V. Valtakari | 1986-11-25 |