Construction of staircases,申请号US19460648262-传众专利搜索

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法人/股东/高管

发明名称	Construction of staircases
摘要
申请公布号	US2471352(A)	申请公布日期	1949.05.24
申请号	US19460648262	申请日期	1946.02.18
申请人	OTTO SAFIR	发明人	SAFIR OTTO
分类号	E04F11/035	主分类号	E04F11/035
代理机构		代理人
主权项
地址

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