Pertti Puurunen

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Patents Grantslast 30 patents

Information Patent Grant
Dual-frequency helix antenna
- Patent number 6,340,954
- Issue date Jan 22, 2002
- Filtronic LK Oy
- Petteri Annamaa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Antenna of a radio device and a method to manufacture it and a radi...
- Patent number 6,326,925
- Issue date Dec 4, 2001
- Filtronic LK Oy
- Yrjö Perkiö
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Resonator device including U-shaped coupling support element
- Patent number 5,604,471
- Issue date Feb 18, 1997
- LK-Products Oy
- Tapio Rattila
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Helix resonator filter
- Patent number 5,418,508
- Issue date May 23, 1995
- LK-Products Oy
- Pertti Puurunen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Helical resonator filter with adjustable couplings
- Patent number 5,157,363
- Issue date Oct 20, 1992
- LK Products
- Pertti Puurunen
- H01 - BASIC ELECTRIC ELEMENTS