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1955-11-07 |
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1955-12-16 |
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1956-09-26 |
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1958-01-20 |
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Seismic exploration using non-impulsive vibratory sources activated by stationary, Gaussian codes, and processing the results in distortion-free final records particularly useful in urban areas
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1986-08-19 |
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1986-09-29 |
1988-08-30 |
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Dispositif pour engendrer des ondes elastiques focalisees dans un milieu materiel tel que le sous-sol, et methode pour sa mise en oeuvre
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Method for locating an underground septic tank, conduit, or the like using injection/detection synchronization of an acoustic signal and digital signal processing
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