Soundhead,申请号US19350028444-传众专利搜索

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发明名称	Soundhead
摘要
申请公布号	US2109451(A)	申请公布日期	1938.03.01
申请号	US19350028444	申请日期	1935.06.26
申请人	RADIO CORPORATION	发明人	LOOMIS FRED J.;REYNOLDS ELLWOOD W.
分类号	G03B31/00;G03B31/02	主分类号	G03B31/00
代理机构		代理人
主权项
地址

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