DIFF Subgroup
F21S 45/40 Cooling of lighting devices
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
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
IPC defines codes here since 2018.
Child Classifications
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- F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings since 2018 IPC+CPC Available in IPC and CPC