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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11/00
Non-electric lighting devices or systems using daylight
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F21S11/002
characterised by the means for collecting or concentrating the sunlight, e.g. parabolic reflectors or Fresnel lenses
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