Railway-signal holding and positioning device,申请号US19290347609-传众专利搜索

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发明名称	Railway-signal holding and positioning device
摘要
申请公布号	US1748557(A)	申请公布日期	1930.02.25
申请号	US19290347609	申请日期	1929.03.16
申请人	MORRIS GEORGE R	发明人	MORRIS GEORGE R.
分类号	B61L5/24	主分类号	B61L5/24
代理机构		代理人
主权项
地址

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