Transistor hearing aid,申请号US19590800175-传众专利搜索

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发明名称	Transistor hearing aid
摘要
申请公布号	US3014995(A)	申请公布日期	1961.12.26
申请号	US19590800175	申请日期	1959.03.18
申请人	ZENITH RADIO CORPORATION	发明人	MILLER BERTRAND J.;WERTWIJN GEORGE
分类号	H03F3/183	主分类号	H03F3/183
代理机构		代理人
主权项
地址

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