Wearable electronic hearing aid having the amplifier and the batteries contained in a common casing,申请号US19440526877-传众专利搜索

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发明名称	Wearable electronic hearing aid having the amplifier and the batteries contained in a common casing
摘要
申请公布号	US2482288(A)	申请公布日期	1949.09.20
申请号	US19440526877	申请日期	1944.03.17
申请人	BELTONE HEARING AID CO.	发明人	POSEN SAM
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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