Improvements in telephone systems and automatic switches suitable for use therein,申请号GB19370002933-传众专利搜索

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发明名称	Improvements in telephone systems and automatic switches suitable for use therein
摘要
申请公布号	GB489665(A)	申请公布日期	1938.08.02
申请号	GB19370002933	申请日期	1937.02.01
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED;JOHN ST. CLARE WILLIAM GRAHAM	发明人
分类号	H01H67/06;H04Q5/00	主分类号	H01H67/06
代理机构		代理人
主权项
地址

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