Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5490405 | Cylinder lock--key--combination | Seija Ramo, Pekka Vehvilainen | 1996-02-13 |
| 5205143 | Cylinder lock | Reijo Hakkarainen, Seija Ramo, Kaarlo Martikainen | 1993-04-27 |
| 4686843 | Cylinderlock-key-combination | Kaarlo Martikainen | 1987-08-18 |
| 4637240 | Cylinder lock | Kaarlo Martikainen | 1987-01-20 |
| 4445299 | Arrangement in doors | Keijo Lehikoinen | 1984-05-01 |