Method for generating seismic shearing waves in a subterranean f

Method for improving the efficiency of air guns

Method for reshaping acoustical pressure pulses

Method of and apparatus for generating shear seismic waves

Method of generating a seismic signal employing a water piston

Method of seismic evaluation of subterranean strata

Methods and apparatus for the generation and transmission of sei

Methods and apparatus for use in generating and transmitting aco

Methods of and apparatus for generating seismic waves

Mixed device for generating longitudinal or shear waves

Mobil device for generating acoustic shear waves in the earth

Mobile device for generating acoustic shear waves

Mobile high frequency vibrator system

Mobile seismic energy source

Modular gas-powered subsea seismic source

Monopole-driven underwater sound source

Mounting and control means for full waveform seismic source

Mounting and control means for full waveform seismic source

Movable device for generating acoustic shear waves in the earth

Moving seismic source system for use in water-covered areas