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System for generating correction signals for use in forming low distortion analog signals
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Method for attenuating undesirable data, such as multiples, using constrained cross-equalization
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Method of making an electrical connector
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Self-orienting vertically sensitive accelerometer
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Method and apparatus for detecting orientation of downhole geophones
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Self-orienting vertically sensitive accelerometer
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Energy source for seismic surveying
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Method of source coding and harmonic cancellation for vibrational geophysical survey sources
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Reinforcement of surface seismic wavefields
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System for attenuation of water-column reverberation
