Electromagnetic sound warning apparatus,申请号GB19300010686-传众专利搜索

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发明名称	Electromagnetic sound warning apparatus
摘要
申请公布号	GB340457(A)	申请公布日期	1931.01.01
申请号	GB19300010686	申请日期	1930.04.04
申请人	MARGUERITE MARIE-LOUISE GENTILHOMME	发明人
分类号	G10K9/15	主分类号	G10K9/15
代理机构		代理人
主权项
地址

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