Railway brake-controlling apparatus,申请号US19300430292-传众专利搜索

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发明名称	Railway brake-controlling apparatus
摘要
申请公布号	US1775809(A)	申请公布日期	1930.09.16
申请号	US19300430292	申请日期	1930.02.21
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	BUCK LEO L.
分类号	B61L3/00	主分类号	B61L3/00
代理机构		代理人
主权项
地址

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