Improvements in or relating to exchange systems for interconnecting telegraph apparatus,申请号GB19290033854-传众专利搜索

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发明名称	Improvements in or relating to exchange systems for interconnecting telegraph apparatus
摘要
申请公布号	GB342735(A)	申请公布日期	1931.02.06
申请号	GB19290033854	申请日期	1929.11.06
申请人	STANDARD TELEPHONES AND CABLES, LIMITED;ERIC MALCOLM SWIFT MCWHIRTER;JAMES GEORGE FLINT;STANLEY CHAPMAN	发明人
分类号	H04L12/00	主分类号	H04L12/00
代理机构		代理人
主权项
地址

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