Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4612747 | Connection of a cast-in-place reinforced concrete slab to a prefabricated column | Wolfhart Andra, Wilhelm Zellner, Willi Kunzl, Horst Falkner, Hans-Peter Andra | 1986-09-23 |