Matti Purhonen

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Helsinki, FI

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Patents Grantslast 30 patents

Information Patent Grant
Closure device
- Patent number 4,733,606
- Issue date Mar 29, 1988
- Temet Oy
- Klaus Frestadius
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Noise absorber for air or gas flows
- Patent number 4,109,754
- Issue date Aug 29, 1978
- Temet OY.
- Matti Purhonen
- F24 - HEATING RANGES VENTILATING