Railway signaling system,申请号US19330703083-传众专利搜索

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发明名称	Railway signaling system
摘要
申请公布号	US2088080(A)	申请公布日期	1937.07.27
申请号	US19330703083	申请日期	1933.12.19
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	CRAGO PAUL H.
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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