Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5088866 | Indicator-nut threaded coupling with load-indicating device adapted to be arranged on anchors, in particular grouted anchors for mining or the like | Ernst Friedrich Ischebeck | 1992-02-18 |
| 4752157 | Trench shoring box unit | Ernst Friedrich Ischebeck | 1988-06-21 |