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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G05D1/04
Control of altitude or depth
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G05D1/06
Rate of change of altitude or depth
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G05D1/0607
specially adapted for aircraft
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G05D1/0688
Emergency descent
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