Improvements in electric signalling systems,申请号GB19310020247-传众专利搜索

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发明名称	Improvements in electric signalling systems
摘要
申请公布号	GB381620(A)	申请公布日期	1932.10.13
申请号	GB19310020247	申请日期	1931.07.14
申请人	THE GENERAL ELECTRIC COMPANY LIMITED;EDGAR PHILIP LAWRENCE WESTELL	发明人
分类号	H04J1/14	主分类号	H04J1/14
代理机构		代理人
主权项
地址

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