IC 011. US 013 021 023 031 034. G & S: Apparatus for ventilating, in particular ventilation hoods; roof ventilation hoods of glass
IC 019. US 001 012 033 050. G & S: Glazing units of non-metallic materials for use in rooflights in buildings; glazed non-metal doors with non-metallic frames: opening non-metal roof vents for cooling, ventilation etc., in residential and commercial buildings; glass roof vents for cooling, ventilation etc., in residential and commercial buildings; parts and fittings for the aforesaid goods; glass panels for building construction purposes
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