Improvements in signalling systems,申请号GB19350006631-传众专利搜索

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发明名称	Improvements in signalling systems
摘要
申请公布号	GB441171(A)	申请公布日期	1936.01.14
申请号	GB19350006631	申请日期	1935.03.02
申请人	HAZELTINE CORPORATION	发明人
分类号	H03G3/22	主分类号	H03G3/22
代理机构		代理人
主权项
地址

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