Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6758956 | Method for darkening a superficial layer which contains zinc and which is of a material piece | Peter Meisterjahn | 2004-07-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6758956 | Method for darkening a superficial layer which contains zinc and which is of a material piece | Peter Meisterjahn | 2004-07-06 |