CPC Subgroup
F21S 45/20 Promoting gas flow in lighting devices, e.g. directing flow toward the cover glass for demisting (ventilation F21S45/30; forced cooling F21S45/42)
Full Title
Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light > Promoting gas flow in lighting devices, e.g. directing flow toward the cover glass for demisting (ventilation F21S45/30; forced cooling F21S45/42)