Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4693870 | Tubular ozonizer with cooled inner electrode | Michael Hirth, Ulrich Kogelschatz | 1987-09-15 |
| 4654199 | High-power ozonizer | Michael Hirth, Ulrich Kogelschatz | 1987-03-31 |