Verfahren und Vorrichtung zur Aufnahme und Wiedergabe von Tonfilmen,申请号DE1925S071516D-传众专利搜索

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发明名称	Verfahren und Vorrichtung zur Aufnahme und Wiedergabe von Tonfilmen
摘要
申请公布号	DE490002(C)	申请公布日期	1930.07.30
申请号	DE1925S071516D	申请日期	1925.09.15
申请人	SIEMENS & HALSKE AKT.-GES.	发明人	GERLACH ERWIN
分类号	G11B7/00;H03G7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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