Drop door for railway cars,申请号US19310509711-传众专利搜索

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发明名称	Drop door for railway cars
摘要
申请公布号	US1870905(A)	申请公布日期	1932.08.09
申请号	US19310509711	申请日期	1931.01.19
申请人	UNION METAL PRODUCTS COMPANY	发明人	GILPIN GARTH G.
分类号	B61D7/18	主分类号	B61D7/18
代理机构		代理人
主权项
地址

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