Method for preparing learning matter and corresponding sound transmission device,申请号AU20020317692-传众专利搜索

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发明名称	Method for preparing learning matter and corresponding sound transmission device
摘要
申请公布号	AU2002317692(A1)	申请公布日期	2003.03.03
申请号	AU20020317692	申请日期	2002.06.27
申请人	DUFEK, OTTO, K.	发明人	OTTO K. DUFEK
分类号	G09B5/06;(IPC1-7):G09B5/06;H04M1/60	主分类号	G09B5/06
代理机构		代理人
主权项
地址

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