Pekka Perjo

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Helsinki, FI

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Patents Grantslast 30 patents

Information Patent Grant
Push button for an elevator
- Patent number D255667
- Issue date Jul 1, 1980
- Kone Osakeyhtio
- Pekka Perjo
- D10 - Measuring, testing, or signalling instruments
Information Patent Grant
Up and down directional signal for an elevator
- Patent number D255105
- Issue date May 27, 1980
- Kone Osakeyhtio
- Pekka Perjo
- D10 - Measuring, testing, or signalling instruments
Information Patent Grant
Up and down directional signal for an elevator
- Patent number D254484
- Issue date Mar 18, 1980
- Kone Osakeyhtio
- Pekka Perjo
- D10 - Measuring, testing, or signalling instruments