Improvements in selective sound-reproducing machines,申请号GB19290029783-传众专利搜索

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发明名称	Improvements in selective sound-reproducing machines
摘要
申请公布号	GB342746(A)	申请公布日期	1931.02.02
申请号	GB19290029783	申请日期	1929.10.02
申请人	JOHN GEORGE BRENNER;BERNARD WILLIAM BRENNER	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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