Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882499 | Fiber-optic detector for oils and solvents | Aarre Matilainen, Jarmo Viirto | 1989-11-21 |
| 4833928 | Method and apparatus for noncontacting tension measurement in a flat foil and especially in a paper web | Tapio Marttinen | 1989-05-30 |