Signaling system for single-track railroads,申请号US19460711851-传众专利搜索

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发明名称	Signaling system for single-track railroads
摘要
申请公布号	US2503728(A)	申请公布日期	1950.04.11
申请号	US19460711851	申请日期	1946.11.23
申请人	THE UNION SWITCH AND SIGNAL COMPANY	发明人	GROSJEAN WILBUR V.
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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