Patent classifications
G
PHYSICS
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G01
MEASURING; TESTING
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G01C
MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
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25/00
Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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G01C25/005
initial alignment, calibration or starting-up of inertial devices
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