Method and apparatus for selecting and prescribing audiphones,申请号US19360085502-传众专利搜索

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发明名称	Method and apparatus for selecting and prescribing audiphones
摘要
申请公布号	US2112569(A)	申请公布日期	1938.03.29
申请号	US19360085502	申请日期	1936.06.16
申请人	E. A. MYERS & SONS	发明人	LYBARGER SAMUEL F.
分类号	H04R25/00	主分类号	H04R25/00
代理机构		代理人
主权项
地址

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