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US08091140B2 Electro-mechanical system for non-duplication of audio files 失效
机电系统不重复音频文件

Electro-mechanical system for non-duplication of audio files
Abstract:
A system consisting of a memory storage unit in which the licensed audio files are stored. The function of this device is to recognize the requested data and thereby allow the audio file contents from the memory storage unit according to the instructions set to this device. It is an effective means for protecting the audio files in the device from duplication.
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