Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6468723 | Concentrate comprising a p-phenylenediamine derivative | Gustav Tappe, Gerhard Schmid | 2002-10-22 |
| 6413703 | Color photographic developer concentrate | Gustav Tappe | 2002-07-02 |
| 6251573 | Color photographic developer concentrate | Gustav Tappe | 2001-06-26 |
| 5072232 | End-fed rod antenna | — | 1991-12-10 |