Air gun with reciprocating shuttle

Air release control in seismic energy source air gun

Air release in seismic source air gun

Airgun apparatus providing high strength and high pressure capab

Alignment restoration means for use in seismic apparatus

Amphibious seismic source

Apparatus and method for illuminating 3-D geologic targets with

Apparatus and seismic method

Apparatus for generating seismic waves

Apparatus for generating waves in the ground

Apparatus for imparting seismic signals into the earth

Apparatus for marine shear wave prospecting

Apparatus for removal of condensation from a marine gas exploder

Apparatus for the generation of acoustic signals in marine envir

Apparatus for the production of seismic shocks

Apparatus for wires in the ground

Apparatus having push/pull actuated boom for generating waves in

Array seismic fluid transducer source

Axially extended downhole seismic source

Base plate and earth coupling assembly for shear-wave transducer