CPC Subgroup Additional Only
F21V 2200/20 of light guides of a generally planar shape
Full Title
Use of light guides, e.g. fibre optic devices, in lighting devices or systems > of light guides of a generally planar shape
F21V 2200/20 Use of light guides, e.g. fibre optic devices, in lighting devices or systems > of light guides of a generally planar shape