Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826639 | Moulding process and apparatus for making arch-shaped concrete structures | Henri Vidal | 1989-05-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826639 | Moulding process and apparatus for making arch-shaped concrete structures | Henri Vidal | 1989-05-02 |