Esko Sjostrand

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Turku, FI

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Patents Grantslast 30 patents

Information Patent Grant
Absorptive sound attenuator, in particular for air ducts in paper m...
- Patent number 5,260,523
- Issue date Nov 9, 1993
- Valmet Paper Machinery, Inc.
- Henrik Pettersson
- F24 - HEATING RANGES VENTILATING