Schallwiedergabeapparat mit hohlem, kugelartigem Schallkoerper,申请号DE1927H114065D-传众专利搜索

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发明名称	Schallwiedergabeapparat mit hohlem, kugelartigem Schallkoerper
摘要
申请公布号	DE511026(C)	申请公布日期	1930.10.25
申请号	DE1927H114065D	申请日期	1927.11.26
申请人	EMIL FREDRICK HOLINGER;EDWARD CHASE CROWLEY	发明人
分类号	H04R11/02	主分类号	H04R11/02
代理机构		代理人
主权项
地址

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