Replaceable ladder rung,申请号US19290350338-传众专利搜索

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发明名称	Replaceable ladder rung
摘要
申请公布号	US1823509(A)	申请公布日期	1931.09.15
申请号	US19290350338	申请日期	1929.03.27
申请人	PETERS	发明人	PETERS SPENCER M.;ROCHESTER ARTHUR B.
分类号	E06C7/08	主分类号	E06C7/08
代理机构		代理人
主权项
地址

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