Self-propelled percussion unit and method of using same
SH wave generator
Shear wave generator
Shear wave vibrator vehicle isolation system
Signalling device
Sleeve valve for an air gun having a reciprocating shuttle valve
Small powerful hydro gun
Snow field sound imploder
Speaker damper configuration
Spectrally-shaped air gun arrays
Stabilized portable seismic signal transducer
Streamlined, readily towable marine seismic energy source...
Stress wave generator
Submergible marine seismic source
Swept impact seismic technique and apparatus
Swinging-weight vibrator for seismic exploration
System and method for ignition of a gaseous or dispersed...
System for imparting compressional and shear waves into the eart
System for imparting mechanical impulse energy to the ground
System for imparting mechanical impulse energy to the ground