Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884608 | Spike fitted on a vehicle tire for perpendicular contact with the road | — | 1989-12-05 |
| 4871005 | Vehicle tire intended to be fitted with spikes | — | 1989-10-03 |
| 4865100 | Sleeve-mounted spike fitted to a vehicle tire | Erkki Suvanto, Ainetdin Farid | 1989-09-12 |