Knut Bergdahl

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S-852 52 Sundsvall, SE

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Patents Grantslast 30 patents

Information Patent Grant
Arrangement to counteract or prevent spreading of fire or smoke
- Patent number 4,412,477
- Issue date Nov 1, 1983
- Knut Bergdahl
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Arrangement to counteract or prevent spreading of fire or smoke
- Patent number 4,294,165
- Issue date Oct 13, 1981
- Knut Bergdahl
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Arrangement in axial fans, compressors, turbines, pumps or the like
- Patent number 4,219,307
- Issue date Aug 26, 1980
- Knut Bergdahl
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Heat exchange in ventilation installation
- Patent number 4,109,705
- Issue date Aug 29, 1978
- Knut Bergdahl
- F24 - HEATING RANGES VENTILATING