Particle motion sensor mounting for marine seismic sensor...
Pivoted elevator mounting for mobile land seismic energy source
Pneumatic seismic signal generator with independent firing contr
Portable seismic energy source
Portable underwater signalling transducer
Power auger seismic source
Process and a device for hydrodynamic sound pulse generation in
Projectile powered piston
Pulse generator powered vibrator
Pulsed high pressure liquid propellant combustion powered seismi