DIFF Subgroup
F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
Introduced: January 2018
Full Title
Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light > Cooling of lighting devices > Passive cooling, e.g. using fins, thermal conductive elements or openings
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
IPC defines codes here since 2018.
Child Classifications
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- F21S 45/48 with means for conducting heat from the inside to the outside of the lighting devices, e.g. with fins on the outer surface of the lighting device since 2018 IPC+CPC Available in IPC and CPC