Acoustically monitoring concrete vessels and structures

Active logistical tag for cargo

Active noise cancellation through the use of magnetic coupling

Active reduction of tool borne noise in a sonic logging tool

Active seismic monitoring of fracturing operations

Active signal conditioning circuitry for well logging and...

Actuator and gravity gradiometer

Adaptive filtering apparatus and method for seismic data...

Adaptive filtering with reference accelerometer for...

Adaptive monofrequency pilot signals

Adaptive scanning of materials using nuclear resonance...

Adaptive seismic noise and interference attenuation method

Adaptive seismometer group recorder having enhanced...

Adaptively transmitting a signal for activating a tag

Adding positional information for surfaces in a geological...

Adjoint-based conditioning of process-based geologic models

Adjustable deployment apparatus for an actively clamped...

Adjustment for frequency dispersion effects in...

Advanced apparatus for seismic monitoring of an underground...

Advanced device used to test rock samples and other...