Safety switch lock for railroads,申请号US19440556836-传众专利搜索

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发明名称	Safety switch lock for railroads
摘要
申请公布号	US2490742(A)	申请公布日期	1949.12.06
申请号	US19440556836	申请日期	1944.10.02
申请人	SMITH LUCIAN A	发明人	SMITH LUCIAN A.
分类号	B61L11/04	主分类号	B61L11/04
代理机构		代理人
主权项
地址

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