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G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
G01C3/00—Measuring distances in line of sight; Optical rangefinders
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Radar, Positioning & Navigation
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FR856936D1938-06-271939-06-27Dispositif d'index ou d'aiguille de route pour aéromobiles et pour tous véhicules à vitesse constante
ExpiredFR856936A
(fr)