Top Inventors at T-Drill Oy All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Pertti Lehto | 4 |
| 2 | Juha Ikola | 2 |
| 3 | Timo Saari | 2 |
| #4 | Esko Hakola | 1 |
| #5 | Jari Virtanen | 1 |
| #6 | Matti Lehtimaki | 1 |
| #7 | Pasi Pirila | 1 |
| #8 | Risto Kiviranta | 1 |
| #9 | Tero Rapila | 1 |
| #10 | Timo Kangas | 1 |
| #11 | Tommi Aho | 1 |
| #12 | Vesa Ropponen | 1 |
| #13 | Kari Haavisto | 1 |