Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5120274 | Ceiling outlet | — | 1992-06-09 |
| 5050638 | Device for controlling a volumetric rate of flow in a guide tube | Hermann Kurrle, Wolfgang Ruf | 1991-09-24 |
| 4258616 | Air outlet for room ventilation | Wolfgang Ruf | 1981-03-31 |