Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12196536 | Pyrotechnic object | Martin Wustlich, Frank Habel, Kai Lübbers, Ernest Schulz, Dirk Cegiel | 2025-01-14 |
| 8432835 | Secure videoconferencing equipment switching system and method | David H. Dirks, Diane Gomes, Corbin J. Stewart | 2013-04-30 |
| 4696700 | Inorganic pigments and process for their production | Dieter de Ahna | 1987-09-29 |
| 4548358 | Multiple piece cutting tip | — | 1985-10-22 |
| 4501778 | Metal effect glazes for ceramic bases | Rolf Menschner | 1985-02-26 |
| 4458884 | Head mixer and thermal conductor for a cutting torch | — | 1984-07-10 |
| 4443265 | Ceramic color body | Heinz D. de Ahna | 1984-04-17 |
| 4413809 | Anti-flashback cutting torch | — | 1983-11-08 |
| 4358321 | Lead-free ceramic pink-coloring material consisting of chromium-tin-calcium-silicon-alkali metal oxide plus bismuth and/or phosphorus oxide and process | Heinz-Dieter DeAhna | 1982-11-09 |