Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6264413 | Fastening element for attaching insulation boards | Heinz Bisping, Thomas Belz, Erich Daigeler | 2001-07-24 |
| 5288162 | Expansion dowel | Heinz Bisping, Horst Goetzfried, Franz Popp, Helmut Mirsberger | 1994-02-22 |