Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6877930 | Method of working a concrete surface | Conny Tangring | 2005-04-12 |
| 4951428 | Device for working at a hard material | — | 1990-08-28 |
| 4619551 | Device for removing degraded concrete | Hans Juan, Jan Bjerngren | 1986-10-28 |