Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5050638 | Device for controlling a volumetric rate of flow in a guide tube | Adalbert Zeller, Wolfgang Ruf | 1991-09-24 |
| 4794851 | Nozzle means for an air conditioning installation | — | 1989-01-03 |
| 4602514 | Device for measuring the volume flow of a gas in a duct | Wolfgang Ruf, Adelbert Zeller | 1986-07-29 |