Koermermikrophon,申请号DE1929M110868D-传众专利搜索

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发明名称	Koermermikrophon
摘要
申请公布号	DE565124(C)	申请公布日期	1932.11.26
申请号	DE1929M110868D	申请日期	1929.06.30
申请人	MATEI MARINESCU	发明人
分类号	H04R21/02	主分类号	H04R21/02
代理机构		代理人
主权项
地址

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