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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2111/00
Details of signals used for control of position, course, altitude or attitude of land, water, air or space vehicles
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G05D2111/36
generated or reflected by cables or wires carrying current, e.g. boundary wires or leaky feeder cables
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