Collapsible stepping box,申请号US19280294460-传众专利搜索

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发明名称	Collapsible stepping box
摘要
申请公布号	US1811674(A)	申请公布日期	1931.06.23
申请号	US19280294460	申请日期	1928.07.21
申请人	LONGLEY FREDERICK W	发明人	LONGLEY FREDERICK W.
分类号	A47C12/02	主分类号	A47C12/02
代理机构		代理人
主权项
地址

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