Improvements in or relating to alternating current signalling systems,申请号GB19350016791-传众专利搜索

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发明名称	Improvements in or relating to alternating current signalling systems
摘要
申请公布号	GB459779(A)	申请公布日期	1937.01.11
申请号	GB19350016791	申请日期	1935.06.11
申请人	THE TELEPHONE MANUFACTURING COMPANY LIMITED;LESLIE HAROLD PADDLE	发明人
分类号	H04B3/20	主分类号	H04B3/20
代理机构		代理人
主权项
地址

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