Door trim speaker grille with electroluminescent lamp and...

Double chamber bass reflex box

Double layer acoustic liner and a fluid pressurizing device...

Double layer attenuation panel

Double layer attenuation panel with two layers of linear type ma

Double throat pulsation dampener for a compressor

Double-wall hollow body with interlayer and method for manufactu

Double-walled structure and connection arrangement

Double-walled structure and method and arrangement for producing

Double-walled tail pipe for an exhaust pipe of a motor...

Down hole periodic seismic generator

Down hole seismographic source

Downhole electro-hydraulic vertical shear wave seismic source

Downhole electromagnetic seismic source

Downhole epicyclic motion orbital seismic source

Downhole hydraulic rotary seismic source

Downhole hydraulic seismic generator

Downhole liquid pressure seismic source and bit positioning syst

Downhole orbital seismic source

Downhole seismic array system