Characterizing spatial variablility of surface waves in...

Checking method for laterolog

Chemical analysis and mineral prospecting

Circuit for controlling the magnitude of amplification of...

Circuit for improving data in pulse detection systems

Circuit for reducing pulse pile-up in pulse detection systems

Circuit for reducing pulse pile-up in pulse detection systems

Circuit for reducing pulse pile-up in pulse detection...

Circuit tracer

Circular seismic acquisition system

Clamp-on ultrasonic transducer

Clamped receiver array using coiled tubing conveyed packer...

Classifying potential hydrocarbon reservoirs using...

Cleated boot for marine seismic cables

Closed air system seismic wave generator

Closed-loop downhole resonant source

Closely spaced pipe-to-soil electrical survey method and...

Coal logging system

Cockcroft-walton voltage multiplying circuit for slim hole...

Coded means and system for neonatal care