Angularly related dual stethoscope head

Annular acoustic panel

Anti-bounce device for a mass striking a target element

Anti-bounce device for a mass striking a target element

Anti-bounce device for preventing the multiple shocks of a movin

Anti-pollution manifold for I.C.E.

Anti-reflective acoustic wavefront refraction element

Anti-sound arrangement for multi-stage blade cascade

Anti-viral acoustically transparent earphone cover

Antifouling damping system for sonar domes

Antinoise barrier with transparent panels, provided with acousti

Apparatus and method for attenuating tube waves in a borehole

Apparatus and method for detecting seismic waves in a borehole u

Apparatus and method for determining the quality of clamping of

Apparatus and method for eliminating electrical noise in the...

Apparatus and method for generating a seismic source signal

Apparatus and method for generating a seismic source signal

Apparatus and method for illuminating 3-D geologic targets with

Apparatus and method for investigating wellbores and the like

Apparatus and method for reduced distortion loudspeakers