Railway signaling apparatus,申请号US19390266368-传众专利搜索

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发明名称	Railway signaling apparatus
摘要
申请公布号	US2182163(A)	申请公布日期	1939.12.05
申请号	US19390266368	申请日期	1939.04.06
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	PLACE WILLARD P.
分类号	B61L23/16	主分类号	B61L23/16
代理机构		代理人
主权项
地址

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