Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827992 | Method for conducting a fluid into a rock cistern | Esa Morsky | 1989-05-09 |
RP
Risto Penttinen
Overall (1989): #65,390 of 140,708Top 50%
1
Patents 1989