Patents per Year
Top Inventors at Oy Helvar All Time
Showing 1–6 of 6 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Teijo Viljanen | 4 |
| 2 | Martti Sairanen | 3 |
| 3 | Matti Virta | 2 |
| #4 | Kari von Hertzen | 1 |
| #4 | Kari Kajavo | 1 |
| #4 | Esko Lampinen | 1 |
Showing 1–6 of 6 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | Teijo Viljanen | 4 |
| 2 | Martti Sairanen | 3 |
| 3 | Matti Virta | 2 |
| #4 | Kari von Hertzen | 1 |
| #4 | Kari Kajavo | 1 |
| #4 | Esko Lampinen | 1 |