Method and apparatus for sound recording,申请号US19360077168-传众专利搜索

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发明名称	Method and apparatus for sound recording
摘要
申请公布号	US2173222(A)	申请公布日期	1939.09.19
申请号	US19360077168	申请日期	1936.04.30
申请人	RADIO CORPORATION OF AMERICA	发明人	BELAR HERBERT
分类号	H04H60/04	主分类号	H04H60/04
代理机构		代理人
主权项
地址

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