Improvements in or relating to a.c. signalling systems,申请号GB19340011566-传众专利搜索

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发明名称	Improvements in or relating to a.c. signalling systems
摘要
申请公布号	GB431600(A)	申请公布日期	1935.07.11
申请号	GB19340011566	申请日期	1934.04.17
申请人	THE GENERAL ELECTRIC COMPANY LIMITED;DENNIS CLARK ESPLEY	发明人
分类号	H04L27/04	主分类号	H04L27/04
代理机构		代理人
主权项
地址

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