Громкоговоритель,申请号SU19310099269-传众专利搜索

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发明名称	Громкоговоритель
摘要
申请公布号	SU28243(A1)	申请公布日期	1932.11.30
申请号	SU19310099269	申请日期	1931.12.11
申请人	ZELYAKH E.V.	发明人	ZELYAKH E.V.
分类号	H04R7/04;H04R9/06	主分类号	H04R7/04
代理机构		代理人
主权项
地址

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