Frequency hopping spread spectrum passive acoustic wave...

Functional monitoring system, in particular access control...

Geophone having electromagnetic damping means

Geophone with damping coil

Handle tag for identification of a container

Hierarchical electronic watermarks and method of use

Highly-directional acoustic source for use in borehole surveys

Homodyne I/Q transceiver for a spread spectrum reader

Hybrid system option key

Hydrophone having a directive lobe in the form of a cardioid

Hydrophone with acoustic reflector

Hydrostatic seismic sensor

IC tag whose function can be changed upon separation

ID issue management system, article information management...

Identification coding schemes for modulated reflectance systems

Identification device detection using multiple signal...

Identification system

Identification transponder

Implantable inductively programmed temperature sensing...

In situ remote sensing