Schallsignalapparat zur Erzeugung hoher Toene von grosser Lautstaerke,申请号DE1928R073841D-传众专利搜索

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发明名称	Schallsignalapparat zur Erzeugung hoher Toene von grosser Lautstaerke
摘要
申请公布号	DE496622(C)	申请公布日期	1930.04.24
申请号	DE1928R073841D	申请日期	1928.02.28
申请人	HELGE SVEN ALBERT RYDBERG	发明人
分类号	G10K9/04	主分类号	G10K9/04
代理机构		代理人
主权项
地址

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