Car retarder for railroads,申请号US19290417439-传众专利搜索

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发明名称	Car retarder for railroads
摘要
申请公布号	US1897006(A)	申请公布日期	1933.02.07
申请号	US19290417439	申请日期	1929.12.30
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人	HOWE WINTHROP K.
分类号	B61K7/08	主分类号	B61K7/08
代理机构		代理人
主权项
地址

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