[ Sonars; radar apparatus; ] navigation systems for unmanned aerial vehicles comprising vision sensors in the nature of on-board computers for detecting and avoiding obstacles, excluding global positioning systems comprised of GPS receivers and a LCD display; azimuth instruments, namely, surveying instruments; laser guide instrument for positioning, alignment and navigation, not for medical purposes [ ; X-ray apparatus not for medical purposes; optical lenses; stereoscopes ]

'aerial':8 'align':48 'apparatus':3,58 'avoid':24 'azimuth':38 'board':19 'compris':10,30 'comput':20 'detect':22 'display':37 'exclud':26 'global':27 'gps':32 'guid':44 'instrument':39,42,45 'laser':43 'lcd':36 'lens':64 'medic':53,61 'name':40 'natur':15 'navig':4,50 'obstacl':25 'on-board':17 'optic':63 'posit':28,47 'purpos':54,62 'radar':2 'ray':57 'receiv':33 'sensor':12 'sonar':1 'stereoscop':65 'survey':41 'system':5,29 'unman':7 'vehicl':9 'vision':11 'x':56 'x-ray':55

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