Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6340954 | Dual-frequency helix antenna | Petteri Annamaa, Tero Kuittinen, Mika Bordi | 2002-01-22 |
| 6326925 | Antenna of a radio device and a method to manufacture it and a radio device | Yrjo Perkio, Matti Niemi, Petteri Annamaa | 2001-12-04 |
| 5604471 | Resonator device including U-shaped coupling support element | Tapio Rattila, Seppo Salmela, Jarmo Valtonen, Kari Lohtander | 1997-02-18 |
| 5418508 | Helix resonator filter | — | 1995-05-23 |
| 5157363 | Helical resonator filter with adjustable couplings | Kai Lehmus | 1992-10-20 |