Method and means for recording sound,申请号US19400345941-传众专利搜索

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发明名称	Method and means for recording sound
摘要
申请公布号	US2293229(A)	申请公布日期	1942.08.18
申请号	US19400345941	申请日期	1940.07.17
申请人	WALKER JOSEPH B	发明人	WALKER JOSEPH B.
分类号	G11B5/54;G11B5/74;G11B15/62	主分类号	G11B5/54
代理机构		代理人
主权项
地址

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