Improvements in or relating to electrical signalling systems,申请号GB19430008902-传众专利搜索

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发明名称	Improvements in or relating to electrical signalling systems
摘要
申请公布号	GB566122(A)	申请公布日期	1944.12.14
申请号	GB19430008902	申请日期	1943.06.03
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED;PHILIP NORTON ROSEBY	发明人
分类号	H02J13/00	主分类号	H02J13/00
代理机构		代理人
主权项
地址

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