Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8505885 | Aeration diffuser | Martin Hildebrand, Merle Kroeker | 2013-08-13 |
| 8083944 | Removing ammonia from waste water during cold weather months | Martin Hildebrand, Merle Kroeker | 2011-12-27 |