Roof hatch for railway cars,申请号US19440548079-传众专利搜索

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发明名称	Roof hatch for railway cars
摘要
申请公布号	US2408733(A)	申请公布日期	1946.10.08
申请号	US19440548079	申请日期	1944.08.04
申请人	ENTERPRISE RAILWAY EQUIPMENT COMPANY	发明人	CAMPBELL ARGYLE
分类号	F16J13/20	主分类号	F16J13/20
代理机构		代理人
主权项
地址

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