Patent classifications
G
PHYSICS
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G05
CONTROLLING; REGULATING
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G05D
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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2109/00
Types of controlled vehicles
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G05D2109/20
Aircraft, e.g. drones
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G05D2109/23
Vertical take-off and landing [VTOL] aircraft; Short take-off and landing [STOL, STOVL] aircraft
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