Ear shield and acoustic transmitting device,申请号US19410420219-传众专利搜索

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发明名称	Ear shield and acoustic transmitting device
摘要
申请公布号	US2342087(A)	申请公布日期	1944.02.15
申请号	US19410420219	申请日期	1941.11.24
申请人	THE MAGNAVOX COMPANY	发明人	PRIDHAM EDWIN S.
分类号	A61F11/14	主分类号	A61F11/14
代理机构		代理人
主权项
地址

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