Multiple chambered gas powered seismic source

Multiple-port, multiple-chamber, tuned air-powered subsea seismi

Multisensor ground-force measuring means for vibroseis

Multishot downhole explosive device as a seismic source

Near-surface seismic investigation source apparatus

No-flash seismic cord

Non-acoustic self noise canceller for sensor arrays

Non-explosive acoustic source

Open-ended seismic source

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

Rapid fire air gun