Number checking system,申请号US19360068256-传众专利搜索

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发明名称	Number checking system
摘要
申请公布号	US2105921(A)	申请公布日期	1938.01.18
申请号	US19360068256	申请日期	1936.03.11
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	KORN FRANKLIN A.
分类号	H04M15/08	主分类号	H04M15/08
代理机构		代理人
主权项
地址

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