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Earth reaction seismic source

Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent

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Echographic technique-based method and apparatus to detect struc

Acoustics – Geophysical or subsurface exploration – Seismic wave detection
Patent

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Elastic wave exploration tool for wells

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Electrically inclination compensated device for picking up...

Acoustics – Geophysical or subsurface exploration – Seismic wave detection
Reexamination Certificate

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Electro-hydraulic dipole vibrator

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Electroacoustic transducer with mechanical impedance transformer

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Electrodynamic transducer head

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Enclosures for containing transducers and electronics on a...

Acoustics – Geophysical or subsurface exploration – Well logging
Reexamination Certificate

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Energy source for use in seismic acquisitions

Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Reexamination Certificate

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Exciting method for logging by S wave

Acoustics – Geophysical or subsurface exploration – Well logging
Patent

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Expanding detonation chamber multi-shot gas exploder

Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent

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External air release control in seismic air gun

Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent

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External bubble-suppression method and apparatus

Acoustics – Geophysical or subsurface exploration – Seismic wave generation
Patent

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