Dictation recording system,申请号US19470756710-传众专利搜索

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发明名称	Dictation recording system
摘要
申请公布号	US2489396(A)	申请公布日期	1949.11.29
申请号	US19470756710	申请日期	1947.06.24
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	BOWNE LANGFORD J.
分类号	H04M11/10	主分类号	H04M11/10
代理机构		代理人
主权项
地址

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