Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5790944 | Measurement of gain error in a base station receiver, and improvement in field strength measurement | Tapani Karki, Eero Valitalo | 1998-08-04 | $13,070,000 |
| 4717285 | Cistern for liquid or gas, constructed of reinforced concrete | — | 1988-01-05 | |
| 4695188 | Lined rock cistern or tunnel | — | 1987-09-22 | |
| 4444529 | Bolt-like fixing assembly for reinforcing rock structure | Tapio Kallio, Tauno Korhonen, Veikko Leiviska, Kalevi Salo | 1984-04-24 |