Diaphragm for acoustic devices,申请号US19320621455-传众专利搜索

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发明名称	Diaphragm for acoustic devices
摘要
申请公布号	US1939447(A)	申请公布日期	1933.12.12
申请号	US19320621455	申请日期	1932.07.08
申请人	GENERAL ELECTRIC COMPANY	发明人	HONIG MARTIN
分类号	H04R7/12	主分类号	H04R7/12
代理机构		代理人
主权项
地址

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