Signaling means for telephone recording apparatus,申请号US19460706849-传众专利搜索

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发明名称	Signaling means for telephone recording apparatus
摘要
申请公布号	US2503176(A)	申请公布日期	1950.04.04
申请号	US19460706849	申请日期	1946.10.31
申请人	THOMAS A. EDISON, INCORPORATED	发明人	SOMERS RICHARD M.
分类号	H04M1/656	主分类号	H04M1/656
代理机构		代理人
主权项
地址

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