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Method and system for resolving double difference GPS carrier phase integer ambiguity utilizing decentralized Kalman filters
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Means for and methods of homing under radar signals
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Dual use of ranging radio
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Delay control circuit
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Methods of and means for determining the time-center of pulses
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Self monitoring intruder detecting system of noise-cancelling vibration detectors
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Pulse-hyperbolic location system using three passive beacon measurements
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Method of and apparatus for guiding agricultural aircraft
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FM Radio ranging system
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Methods of small volume pumping especially suited for oil recovery from stripper wells
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Downhole valve which may be installed or removed by a wireline running tool
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Synchronized pulse amplitude control for pulse measuring circuits
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Wireline running tool
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Oil and gas well disaster valve control system
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Radar trilateralization position locators
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Downhole valve
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Secure encoder for trilateralization locator utilizing very narrow acceptance periods
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Radar trilateralization position locators
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