Improvements in or relating to intercommunication telephone systems,申请号GB19510023751-传众专利搜索

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发明名称	Improvements in or relating to intercommunication telephone systems
摘要
申请公布号	GB707311(A)	申请公布日期	1954.04.14
申请号	GB19510023751	申请日期	1952.10.11
申请人	ADOLF ERWIN ADLER	发明人
分类号	H04M9/00	主分类号	H04M9/00
代理机构		代理人
主权项
地址

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