Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5082438 | Press for manufacturing stones | Willem Klein | 1992-01-21 |
| 4886633 | Method for manufacturing stones in a press | Willem Klein | 1989-12-12 |
| 4856976 | Device for manufacturing stones | Willem Klein | 1989-08-15 |