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Patent classifications
B
PERFORMING OPERATIONS; TRANSPORTING
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B64
AIRCRAFT; AVIATION; COSMONAUTICS
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B64U
UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
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50/00
Propulsion; Power supply
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B64U50/30
Supply or distribution of electrical power
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B64U50/37
Charging when not in flight
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B64U50/38
by wireless transmission
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