Apparatus and method for keeping pets in a defined boundary...

Apparatus and method for liquid level measurement and...

Apparatus and method for liquid level measurement in a...

Apparatus and method for liquid level measurement in a...

Apparatus and method for locating a terminal in a broadband...

Apparatus and method for locating an emitter using RF carrier or

Apparatus and method for locating cellular telephones

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Apparatus and method for locating objects under a body of water

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Apparatus and method for mapping surfaces of an object

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Apparatus and method for measuring the azimuth and elevation of

Apparatus and method for measuring the distance to an object

Apparatus and method for microwave interferometry radiating...

Apparatus and method for minimizing multipath signal errors...

Apparatus and method for mitigating multipath

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Apparatus and method for navigating vehicle using GPS