Device and method for generating a beam of acoustic energy...

Device and method for measuring seismic waves

Device and method for transmitting acoustic wave into...

Device and process for gravitation measurement

Device and process for seismic measurements in a drill hole

Device for amplifying and sampling analog signals

Device for amplifying and sampling multiplex signals

Device for automatically compensating the magnetism of drill...

Device for borehole sismic data acquisition and transmission...

Device for detecting and locating fluid leaks

Device for detecting metallic objects in a flow of...

Device for electromagnetic surveying

Device for emitting hf signals, particularly in an...

Device for emitting seismic vibration waves

Device for generating acoustic waves by means of percussion...

Device for generating acoustical waves

Device for generating focused elastic waves in a material...

Device for generating percussive acoustic impulses in a well

Device for generating seismic waves within a well, using a...

Device for generating simultaneously, in the ground,...