Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5714052 | Method for producing brochantite patina on copper | Stefan Hoveling, Dirk Rode, Ruzica Luetic | 1998-02-03 |
| 5282890 | Process for producing brown covering layers on copper | Constantin Puscasu, Stefan Hoveling, Albert Scherger | 1994-02-01 |