Improvements in or relating to sound producers and receivers,申请号GB19460005441-传众专利搜索

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发明名称	Improvements in or relating to sound producers and receivers
摘要
申请公布号	GB642301(A)	申请公布日期	1950.08.30
申请号	GB19460005441	申请日期	1946.02.21
申请人	RAYTHEON MANUFACTURING COMPANY	发明人
分类号	G10K11/32	主分类号	G10K11/32
代理机构		代理人
主权项
地址

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