Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10710902 | System and apparatus for determining and controlling water clarity | — | 2020-07-14 |
| 7033502 | UV lamp supported filter cartridge | Rolf Engelhard | 2006-04-25 |
| 6830686 | Filter cartridge support | Rolf Engelhard | 2004-12-14 |
| 6461520 | User-activated ultra-violet water treatment unit | Rolf Engelhard | 2002-10-08 |
| 6267895 | Catalytic dental water apparatus | Rolf Engelhard | 2001-07-31 |
| 5942125 | Dental unit water purifier | Rolf Engelhard | 1999-08-24 |