Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4804401 | Method of producing a phosphorus fertilizer soil conditioner | by Anna-Maija Wahlberg, legal representative | 1989-02-14 |
| 4710219 | Production method of combined phosphorus fertilizer and soil conditioner | by Anna-Maija Wahlberg, legal representative | 1987-12-01 |
| 4571254 | Method for producing fertilizer from tree ash and softwood bark or from other tree waste | — | 1986-02-18 |
| 4246018 | Process for the production of a fertilizer from bark | — | 1981-01-20 |