System for automatically ticketing telephone calls,申请号US19480054559-传众专利搜索

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发明名称	System for automatically ticketing telephone calls
摘要
申请公布号	US2657268(A)	申请公布日期	1953.10.27
申请号	US19480054559	申请日期	1948.10.14
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	RETALLACK JOHN B.
分类号	H04M15/04	主分类号	H04M15/04
代理机构		代理人
主权项
地址

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