Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4436790 | Gold-colored coin material | Bruno Prinz, Manfred Rockel, Gunther Rudolph, Ulrich Heubner | 1984-03-13 |
| 4401488 | Gold-colored coin material | Bruno Prinz, Manfred Rockel, Gunther Rudolph, Ulrich Heubner | 1983-08-30 |