Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4671311 | Admixer for delivering soluble additives | Willi Hepperle, Johann Katzer, Christian Stephany | 1987-06-09 |
| 4639018 | Joint for a water-carrying pipe system | Willi Hepperle, Johann Katzer, Christian Stephany | 1987-01-27 |