B
PERFORMING OPERATIONS; TRANSPORTING
B
PERFORMING OPERATIONS; TRANSPORTING
B64
AIRCRAFT; AVIATION; COSMONAUTICS
B64
AIRCRAFT; AVIATION; COSMONAUTICS
B64U
UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
B64U
UNMANNED AERIAL VEHICLES [UAV]; EQUIPMENT THEREFOR
30/00
Means for producing lift; Empennages; Arrangements thereof
30/00
Means for producing lift; Empennages; Arrangements thereof
B64U30/20
Rotors; Rotor supports
B64U30/20
Rotors; Rotor supports
B64U30/26
Ducted or shrouded rotors
B64U30/26
Ducted or shrouded rotors