Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6114832 | Charging method and charging arrangement | Erkki Lappi, Vesa-Pekka Torvinen, Ilkka Heikkila | 2000-09-05 |
| 6104947 | Method and apparatus for determining exertion levels in fitness or athletic training and for determining the stress caused by training | Ilkka Heikkila | 2000-08-15 |
| 5622180 | Device for measuring heartbeat rate | Tapio Tammi | 1997-04-22 |
| 5611346 | Method of interference-tolerant transmission of heartbeat signals | Ilkka Heikkila | 1997-03-18 |