Improvements in electrical switching devices employed in electrical signalling systems,申请号GB19370005270-传众专利搜索

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发明名称	Improvements in electrical switching devices employed in electrical signalling systems
摘要
申请公布号	GB490765(A)	申请公布日期	1938.08.22
申请号	GB19370005270	申请日期	1937.02.22
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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