Arvi Tolmunen

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Kausala, FI

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Patents Grantslast 30 patents

Information Patent Grant
Air exhausting means
- Patent number 4,811,724
- Issue date Mar 14, 1989
- Halton Oy
- Erkki Aalto
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Control/fire damper for ducts inventilation installations
- Patent number 4,625,626
- Issue date Dec 2, 1986
- Halton Oy
- Arvo Aalto
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Gas flow regulating and measuring apparatus
- Patent number 4,190,085
- Issue date Feb 26, 1980
- Halton Oy
- Juhani Hasa
- F24 - HEATING RANGES VENTILATING