Improvements in or relating to telephone systems,申请号GB19310019718-传众专利搜索

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发明名称	Improvements in or relating to telephone systems
摘要
申请公布号	GB377407(A)	申请公布日期	1932.07.28
申请号	GB19310019718	申请日期	1931.07.09
申请人	ERICSSON TELEPHONES LIMITED;PETER DOIG;ERNEST ROBINSON;BERTRAM ARTHUR GREEN	发明人
分类号	H04M1/58	主分类号	H04M1/58
代理机构		代理人
主权项
地址

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