Railway braking apparatus,申请号US19330657204-传众专利搜索

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发明名称	Railway braking apparatus
摘要
申请公布号	US1931149(A)	申请公布日期	1933.10.17
申请号	US19330657204	申请日期	1933.02.17
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	JR. JOHN W. LOGAN,
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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