Method of and apparatus for control of train movements,申请号US19190315880-传众专利搜索

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发明名称	Method of and apparatus for control of train movements
摘要
申请公布号	US1889724(A)	申请公布日期	1932.11.29
申请号	US19190315880	申请日期	1919.08.07
申请人	SPRAGUE SAFETY CONTROL AND SIGNAL CORPORATION	发明人	SPRAGUE FRANK J.
分类号	B61L3/12	主分类号	B61L3/12
代理机构		代理人
主权项
地址

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