Vorrichtung zur mechanischen Erzeugung konstanter Schwingungen (Stimmgabel etc.), bestehend aus zwei solcher Vorrichtungen,申请号DE1929M112166D-传众专利搜索

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发明名称	Vorrichtung zur mechanischen Erzeugung konstanter Schwingungen (Stimmgabel etc.), bestehend aus zwei solcher Vorrichtungen
摘要
申请公布号	DE507643(C)	申请公布日期	1930.09.18
申请号	DE1929M112166D	申请日期	1929.10.08
申请人	MARCONI'S WIRELESS TELEGRAPH COMPANY, LTD.	发明人
分类号	H04N5/04	主分类号	H04N5/04
代理机构		代理人
主权项
地址

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