Improvements in and relating to transducers,申请号GB19570003173-传众专利搜索

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发明名称	Improvements in and relating to transducers
摘要
申请公布号	GB850076(A)	申请公布日期	1960.09.28
申请号	GB19570003173	申请日期	1957.01.29
申请人	FILM AND RADIO;ANDRE LOUIS MARIE DUPUIS	发明人
分类号	H03B5/30;H03C3/28	主分类号	H03B5/30
代理机构		代理人
主权项
地址

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