Improvements in or relating to testing methods in telephone exchanges,申请号GB19300031841-传众专利搜索

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发明名称	Improvements in or relating to testing methods in telephone exchanges
摘要
申请公布号	GB361079(A)	申请公布日期	1931.11.19
申请号	GB19300031841	申请日期	1930.10.23
申请人	COVENTRY AUTOMATIC TELEPHONES LIMITED;ALEXANDER ALBERT CHUBB	发明人
分类号	H04M3/28	主分类号	H04M3/28
代理机构		代理人
主权项
地址

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