Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7967532 | Ground anchor or rock anchor with an anchor tension member comprised of one or more individual elements with corrosion-protected anchor head design | Frank Schmidt | 2011-06-28 |
| 7553108 | Method and arrangement for stressing a staggered anchorage | Frank Schmidt | 2009-06-30 |
| 7381013 | Rock bolt post grouting apparatus | Mieczyslaw Rataj | 2008-06-03 |
| 5603589 | Method for manufacturing an anchor element for a soil anchor for a rock anchor, rock bolt or the like, from a strand of twisted steel wire | Hans Peter Von Allmen, Reinhard Klockner, Engelbert Gott | 1997-02-18 |
| 4633540 | Tension tie member | Dieter Jungwirth, Gerd Thielen | 1987-01-06 |
| 4473936 | Process for manufacturing a protection against corrosion for cables of high-strength steel wires | Urs Kellner, Thomas Herbst | 1984-10-02 |
| 4449855 | Anchor head for a corrosion-protected injected anchor | — | 1984-05-22 |