Improvements in signaling apparatus,申请号GB19320033688-传众专利搜索

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发明名称	Improvements in signaling apparatus
摘要
申请公布号	GB391393(A)	申请公布日期	1933.04.27
申请号	GB19320033688	申请日期	1932.11.28
申请人	SUBMARINE SIGNAL COMPANY	发明人
分类号	H04L15/22	主分类号	H04L15/22
代理机构		代理人
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