Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5372769 | Method of producing concrete elements | — | 1994-12-13 |
| 4660331 | Concrete-filled structural tube with cantilevers, particularly for balcony floors | Gustav L. Dahlen | 1987-04-28 |