Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5493828 | Stressing anchorage for prestressing elements in a part of a structure | Erwin Siegfried | 1996-02-27 |
| 5345742 | Force transfer body for an anchorage | Erwin Siegfried | 1994-09-13 |