Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4425769 | Method for treating a gem and gem treated with this method | — | 1984-01-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4425769 | Method for treating a gem and gem treated with this method | — | 1984-01-17 |