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Borehole logging tool
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Patent number 5,357,481
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Issue date Oct 18, 1994
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Western Atlas International, Inc.
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Robert A. Lester
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G01 - MEASURING TESTING
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Geophone borehole cable
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Patent number 5,192,948
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Issue date Mar 9, 1993
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Mobil Oil Corporation
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William H. Troyer
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G01 - MEASURING TESTING
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Downhole hydraulic seismic generator
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Patent number 5,113,966
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Issue date May 19, 1992
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The United States of America as represented by the United States Department o...
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Danny L. Gregory
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G01 - MEASURING TESTING
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Pneumatic wall-locking geophone system
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Patent number 5,060,751
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Issue date Oct 29, 1991
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The United States of America as represented by the Secretary of the Interior
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Harland L. Kuhlman
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E21 - EARTH DRILLING MINING
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