DIFF Subgroup
F21S 41/63 by acting on refractors, filters or transparent cover plates
Introduced: January 2018
Full Title
Full titles differ between systems:
IPC:
Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps > characterised by a variable light distribution > by acting on refractors, filters or transparent cover plates
CPC:
Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps (reversing lights F21S43/00) > characterised by a variable light distribution > by acting on refractors, filters or transparent cover plates
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
IPC defines codes here since 2018.
Child Classifications
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- F21S 41/64 by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices since 2018 +1 CPC IPC+CPC Available in IPC and CPC