Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4905903 | Sprinkler | Johann Katzer, Christian Stephany | 1990-03-06 |
| 4673307 | Washing brush with adjustable head | Erich Prestele, Alfred Schneider, Johann Katzer, Christian Stephany, Franz Lopic | 1987-06-16 |
| 4671311 | Admixer for delivering soluble additives | Johann Katzer, Hans Froelich, Christian Stephany | 1987-06-09 |
| 4639018 | Joint for a water-carrying pipe system | Hans Froelich, Johann Katzer, Christian Stephany | 1987-01-27 |