Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4681664 | Process for producing pieces of jewelry from precious metals and pieces of jewelry produced by it | Wilfried Essert, Herbert Kull | 1987-07-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4681664 | Process for producing pieces of jewelry from precious metals and pieces of jewelry produced by it | Wilfried Essert, Herbert Kull | 1987-07-21 |