Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9200422 | Method and arrangement for supporting structure | Sami Häkkinen, Antti Perala | 2015-12-01 |
| 8956083 | Method and apparatus for injecting material into soil | Sami Häkkinen | 2015-02-17 |
| 7789591 | Method and arrangement for improving soil and/or for lifting structures | Sami Häkkinen | 2010-09-07 |