PERFECCIONAMIENTOS EN MICROFONOS Y SUS SIMILARES,申请号ES19400001240-传众专利搜索

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发明名称	PERFECCIONAMIENTOS EN MICROFONOS Y SUS SIMILARES
摘要
申请公布号	ES124040(A1)	申请公布日期	1931.10.16
申请号	ES19400001240	申请日期	1931.09.07
申请人	MARCONI'S WIRELESS TELEGRAPH COMPANY, LIMITED	发明人
分类号	(IPC1-7):H04	主分类号	(IPC1-7):H04
代理机构		代理人
主权项
地址

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