Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827992 | Method for conducting a fluid into a rock cistern | Risto Penttinen | 1989-05-09 |
EM
Esa Morsky
Overall (1989): #116,109 of 140,708Top 85%
1
Patents 1989