Improvements in or relating to telephone instruments,申请号GB19520026035-传众专利搜索

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发明名称	Improvements in or relating to telephone instruments
摘要
申请公布号	GB697780(A)	申请公布日期	1953.09.30
申请号	GB19520026035	申请日期	1950.05.10
申请人	AUTOMATIC TELEPHONE AND ELECTRIC COMPANY LIMITED	发明人	ELLIS JOHN HENRY;BURSTON SYDNEY ERNEST FRANK
分类号	H04M1/08;H04M1/23	主分类号	H04M1/08
代理机构		代理人
主权项
地址

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