Automatic ticketing telephone system,申请号US19510262195-传众专利搜索

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发明名称	Automatic ticketing telephone system
摘要
申请公布号	US2697748(A)	申请公布日期	1954.12.21
申请号	US19510262195	申请日期	1951.12.18
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	GOODERHAM JOHN W.
分类号	H04M15/08;H04M15/38;H04Q3/42	主分类号	H04M15/08
代理机构		代理人
主权项
地址

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