Railway traffic controlling system,申请号US19310538413-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	US1975136(A)	申请公布日期	1934.10.02
申请号	US19310538413	申请日期	1931.05.19
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人	PALERMO JOHN J.
分类号	B61L21/06	主分类号	B61L21/06
代理机构		代理人
主权项
地址

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