Railway-traffic-controlling system,申请号US19270191735-传众专利搜索

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发明名称	Railway-traffic-controlling system
摘要
申请公布号	US1792455(A)	申请公布日期	1931.02.10
申请号	US19270191735	申请日期	1927.05.16
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人	WIGHT SEDGWICK N.
分类号	B61L23/22	主分类号	B61L23/22
代理机构		代理人
主权项
地址

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