Sound translating device,申请号GB19520004742-传众专利搜索

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发明名称	Sound translating device
摘要
申请公布号	GB706814(A)	申请公布日期	1954.04.07
申请号	GB19520004742	申请日期	1952.02.22
申请人	WALTER CHRISTENSEN	发明人
分类号	H04R1/18	主分类号	H04R1/18
代理机构		代理人
主权项
地址

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