Improvements in or relating to sound recording and reproducing apparatus,申请号GB19410004142-传众专利搜索

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发明名称	Improvements in or relating to sound recording and reproducing apparatus
摘要
申请公布号	GB546195(A)	申请公布日期	1942.07.01
申请号	GB19410004142	申请日期	1941.03.27
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	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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