Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6383375 | Water container with filter cartridge | — | 2002-05-07 |
| 5628895 | Closed circuit for treating drinking water with UV treatment and filtering | — | 1997-05-13 |
| 5122254 | Solid state electrode for the determination of sodium ion concentrations in solutions | Sonja Ammende, Hartmut Erdmann, Heinz-Werner Etzkorn | 1992-06-16 |
| 4976991 | Method for making a sensor for monitoring hydrogen concentrations in gases | Sonya Ammende, Hartmut Erdmann, Heinz-Werner Etzkorn | 1990-12-11 |
| 4908118 | Sensor for monitoring hydrogen concentration in gases | Sonya Ammende, Hartmut Erdmann, Heinz-Werner Etzkorn | 1990-03-13 |