Tonaufzeichnung in Zackenschrift,申请号DE1940R004321D-传众专利搜索

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发明名称	Tonaufzeichnung in Zackenschrift
摘要
申请公布号	DE903278(C)	申请公布日期	1954.02.04
申请号	DE1940R004321D	申请日期	1940.11.09
申请人	RADIO CORPORATION OF AMERICA	发明人	KELOGG EDWARD WASHBURN
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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