Roof opening apparatus for railroad freight cars,申请号US19500178689-传众专利搜索

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发明名称	Roof opening apparatus for railroad freight cars
摘要
申请公布号	US2629339(A)	申请公布日期	1953.02.24
申请号	US19500178689	申请日期	1950.08.10
申请人	KOVACHICK JOSEPH L	发明人	KOVACHICK JOSEPH L.
分类号	B61D39/00	主分类号	B61D39/00
代理机构		代理人
主权项
地址

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