Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5465535 | Method of installing a soil anchor and a soil anchor | — | 1995-11-14 |
| 4661021 | Expansion body | Bengt P. O. Granstrom | 1987-04-28 |
| 4634317 | Method of rock bolting and tube-formed expansion bolt | Gunnar V. R. Romell | 1987-01-06 |
| 4571126 | Expansion body | Bengt P. O. Granstrom | 1986-02-18 |
| 4509889 | Method of rock bolting and tube-formed expansion bolt | Gunnar V. R. Romell | 1985-04-09 |
| 4487528 | Earth anchoring expansion body having folded sheet metal casing | — | 1984-12-11 |
| 4459067 | Method of rock bolting and tube-formed expansion bolt | Gunnar V. R. Romell | 1984-07-10 |
| 4423986 | Method and installation apparatus for rock bolting | — | 1984-01-03 |