Telephone conversation recording device,申请号US19410409232-传众专利搜索

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发明名称	Telephone conversation recording device
摘要
申请公布号	US2319665(A)	申请公布日期	1943.05.18
申请号	US19410409232	申请日期	1941.09.02
申请人	DOBRZENSKY MILTON W	发明人	DOBRZENSKY MILTON W.
分类号	H04M1/65	主分类号	H04M1/65
代理机构		代理人
主权项
地址

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