Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10619310 | Railway track heating device | — | 2020-04-14 |
| 8217744 | Transformer arrangement | Fredrik Grivans | 2012-07-10 |
| 5663636 | Method for reducing waveform distortion in an electrical utility system and circuit for an electrical utility system | Esko Kiiskinen | 1997-09-02 |