Improvements in sound recording apparatus and method,申请号GB19460034118-传众专利搜索

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发明名称	Improvements in sound recording apparatus and method
摘要
申请公布号	GB628606(A)	申请公布日期	1949.09.01
申请号	GB19460034118	申请日期	1946.11.18
申请人	RADIO CORPORATION OF AMERICA	发明人
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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