Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F21
LIGHTING
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F21S
NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
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43/00
Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
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F21S43/20
characterised by refractors, transparent cover plates, light guides or filters
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F21S43/2641
Refractors or refracting portions characterised by their relative arrangement, e.g. parallel refractors
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F21S43/26411
Two or more successive refractors
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