Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9174188 | Lightweight, intrinsically safe ozone electrode | Reiner Fietzek, Ralf Fiekens | 2015-11-03 |
| 8808634 | Lightweight, intrinsically safe ozone electrode | Reiner Fietzek, Ralf Fiekens | 2014-08-19 |
| 8692209 | UV disinfection system for waste water and drinking water including a cleaning device | Friedhelm Krüger, Hans-Joachim Anton, Ralf Fiekens | 2014-04-08 |
| 7560080 | Method and device for generating ozone | Ralf Fiekens, Uwe Hofer | 2009-07-14 |