Improvements in or relating to gramophone pick-ups,申请号GB19460006757-传众专利搜索

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发明名称	Improvements in or relating to gramophone pick-ups
摘要
申请公布号	GB609052(A)	申请公布日期	1948.09.24
申请号	GB19460006757	申请日期	1946.03.05
申请人	RONALD MAURICE CHARLES COOPER	发明人
分类号	H04R9/12	主分类号	H04R9/12
代理机构		代理人
主权项
地址

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