Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4710276 | Process for the galvanoplastic production of jewelry | — | 1987-12-01 |
| 4681664 | Process for producing pieces of jewelry from precious metals and pieces of jewelry produced by it | Rudolf Eberle, Wilfried Essert | 1987-07-21 |