| http://www.w3.org/ns/prov#value | - Agent: Ogilvy Renault LLP20100081929 - Position tracking method, position tracking device, and ultrasonograph: The location tracking method of the present invention is a method for tracking the motion of a measuring point on an object by repeatedly irradiating the object with waves and analyzing received signals that are based on the waves reflected from the object, and includes the steps of: (A)
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