Headband for hearing aid transducers,申请号US19490076068-传众专利搜索

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发明名称	Headband for hearing aid transducers
摘要
申请公布号	US2652457(A)	申请公布日期	1953.09.15
申请号	US19490076068	申请日期	1949.02.12
申请人	ZENITH RADIO CORPORATION	发明人	KNOWLES HUGH S.
分类号	H04M1/05	主分类号	H04M1/05
代理机构		代理人
主权项
地址

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