Improvements in or relating to sound transmitting apparatus,申请号GB19570001062-传众专利搜索

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发明名称	Improvements in or relating to sound transmitting apparatus
摘要
申请公布号	GB817773(A)	申请公布日期	1959.08.06
申请号	GB19570001062	申请日期	1957.01.10
申请人	WILLIAM LYONS	发明人
分类号	H04S5/00	主分类号	H04S5/00
代理机构		代理人
主权项
地址

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