Improvements in and relating to the recording and reproduction of sound,申请号GB19370013212-传众专利搜索

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发明名称	Improvements in and relating to the recording and reproduction of sound
摘要
申请公布号	GB473256(A)	申请公布日期	1937.10.08
申请号	GB19370013212	申请日期	1937.05.08
申请人	KARL HERMANN FRANZ SCHLEGEL	发明人
分类号	G03B31/00	主分类号	G03B31/00
代理机构		代理人
主权项
地址

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