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US07804054B2 Wireless system and method for displaying the path traveled by a marker 有权
用于显示由标记行进的路径的无线系统和方法

Wireless system and method for displaying the path traveled by a marker
Abstract:
A low maintenance path tracing apparatus comprising at least one marker including an emitter of a tracer signal and a receiving medium for recording the path of the tracer signal. The apparatus further includes a power providing arrangement comprising a base unit which wirelessly provides power to the marker for powering the emitter.
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