Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
David Paul Jones0
Date of Patent
December 5, 2006
Patent Application Number
10502891
Date Filed
January 16, 2003
Patent Primary Examiner
Patent abstract
Detection of the presence of an animal body, for instance a human, in a detection zone is achieved by generating a low power LF field (17) between antennae (12, 18), and by measuring the disturbance of this field by the body. An analyser (16) is used detect such disturbance by measuring changes in the phase of the received signal (19).
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