Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5376190 | Method for producing a green protective coating on copper | — | 1994-12-27 |
| 5282890 | Process for producing brown covering layers on copper | Helmut Protzer, Constantin Puscasu, Albert Scherger | 1994-02-01 |