Battery frame for a hearing aid,申请号US19390260080-传众专利搜索

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发明名称	Battery frame for a hearing aid
摘要
申请公布号	US2251928(A)	申请公布日期	1941.08.12
申请号	US19390260080	申请日期	1939.03.06
申请人	LECTRO COMPANY	发明人	FIELD WILLIAM J.;QUAM NORMAN J.
分类号	H04R25/04	主分类号	H04R25/04
代理机构		代理人
主权项
地址

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