Diaphragme pour appareil reproducteur de sons,申请号FRD698821-传众专利搜索

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发明名称	Diaphragme pour appareil reproducteur de sons
摘要
申请公布号	FR698821(A)	申请公布日期	1931.02.05
申请号	FRD698821	申请日期	1930.07.10
申请人	SKALA RESEARCH LABORATORIES, INC.	发明人
分类号	H04R7/04	主分类号	H04R7/04
代理机构		代理人
主权项
地址

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