Railway car retarder,申请号US19320614940-传众专利搜索

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发明名称	Railway car retarder
摘要
申请公布号	US1958294(A)	申请公布日期	1934.05.08
申请号	US19320614940	申请日期	1932.06.02
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	BONE HERBERT L.;LIVINGSTON JOHN 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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