Improvements in signal translating devices,申请号GB19440025828-传众专利搜索

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发明名称	Improvements in signal translating devices
摘要
申请公布号	GB590572(A)	申请公布日期	1947.07.22
申请号	GB19440025828	申请日期	1944.12.22
申请人	WESTERN ELECTRIC COMPANY INCORPORATED	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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