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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1/00
Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
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G05D1/40
Control within particular dimensions
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G05D1/43
Control of position or course in two dimensions [2D]
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