Improvements in or relating to telegraph signal responsive systems,申请号GB19500004134-传众专利搜索

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发明名称	Improvements in or relating to telegraph signal responsive systems
摘要
申请公布号	GB722401(A)	申请公布日期	1955.01.26
申请号	GB19500004134	申请日期	1950.02.17
申请人	WESTERN ELECTRIC COMPANY	发明人
分类号	H04L25/04;H04L25/24	主分类号	H04L25/04
代理机构		代理人
主权项
地址

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