Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836717 | Means for joining concrete piles | Kjell Landaeus | 1989-06-06 |
| 4569402 | Method of controlling impact force and shock interval in drop hammers | Kjell Landaeus | 1986-02-11 |