Improvements in or relating to automatic telephone exchange equipment,申请号GB19490004050-传众专利搜索

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发明名称	Improvements in or relating to automatic telephone exchange equipment
摘要
申请公布号	GB721822(A)	申请公布日期	1955.01.12
申请号	GB19490004050	申请日期	1949.02.14
申请人	HER MAJESTY'S POSTMASTER GENERAL	发明人	BROADHURST SIDNEY WALTER;HAYWARD RODNEY KENNETH
分类号	H04M19/02;H04Q3/42	主分类号	H04M19/02
代理机构		代理人
主权项
地址

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