Patent classifications
F
MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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F21
LIGHTING
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F21L
LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
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4/00
Electric lighting devices with self-contained electric batteries or cells
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F21L4/08
characterised by means for in situ recharging of the batteries or cells
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