Testing arrangement for trunks to community dial offices,申请号US19430486644-传众专利搜索

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发明名称	Testing arrangement for trunks to community dial offices
摘要
申请公布号	US2389076(A)	申请公布日期	1945.11.13
申请号	US19430486644	申请日期	1943.05.12
申请人	AMERICAN TELEPHONE AND TELEGRAPH COMPANY	发明人	PERRY ANTHONY T.
分类号	H04M3/32	主分类号	H04M3/32
代理机构		代理人
主权项
地址

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