Ladder safety step,申请号US19460715228-传众专利搜索

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发明名称	Ladder safety step
摘要
申请公布号	US2488633(A)	申请公布日期	1949.11.22
申请号	US19460715228	申请日期	1946.12.10
申请人	LINDER OTTO A;KLAUSE EDWARD J	发明人	LINDER OTTO A.;KLAUSE EDWARD J.
分类号	E06C7/16	主分类号	E06C7/16
代理机构		代理人
主权项
地址

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