Car retarder for railroads,申请号US19290412757-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	US1840250(A)	申请公布日期	1932.01.05
申请号	US19290412757	申请日期	1929.12.09
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人	PRESCOTT CHARLES W.
分类号	B61K7/04	主分类号	B61K7/04
代理机构		代理人
主权项
地址

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