Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828393 | Method for obtaining a base material for building mortar | Peter C. Thissen, Jan J. Tiemersma | 1989-05-09 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828393 | Method for obtaining a base material for building mortar | Peter C. Thissen, Jan J. Tiemersma | 1989-05-09 |