Improvements in or relating to the recording and reproduction of impulses such as those of audio frequency,申请号GB19340034342-传众专利搜索

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发明名称	Improvements in or relating to the recording and reproduction of impulses such as those of audio frequency
摘要
申请公布号	GB447205(A)	申请公布日期	1936.05.14
申请号	GB19340034342	申请日期	1934.11.29
申请人	RADIO CORPORATION OF AMERICA	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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