DIFF Subgroup
F21V 7/22 characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Reflectors for light sources > characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
CPC:
Reflectors for light sources (characterised by cooling arrangements F21V29/505) > characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 2018.
Child Classifications
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