Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D779633 | Sand filtration aquarium | — | 2017-02-21 |
| 5262205 | Process for producing the ion-sensitive probe electrode of a heavy-metal-ion sensor | Volker Leonhard, Hartmut Erdmann | 1993-11-16 |
| 5260821 | Electrochromic system | Volker Leonhard, Rolf Hartmann, Gertraud Ganson, Werner Weppner | 1993-11-09 |
| 5093301 | Catalyst and method for its manufacture | Franz-Josef Rohr, Norbert Pfeifer | 1992-03-03 |
| 5055440 | Catalyst and method for its manufacture | Franz-Josef Rohr, Andreas Reich | 1991-10-08 |
| 4996117 | High temperature protective coating | Franz-Josef Rohr | 1991-02-26 |
| 4971839 | High-temperature shielding coating and method for producing it | Josef Rohr | 1990-11-20 |