Ladder construction,申请号US19650497847-传众专利搜索

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发明名称	Ladder construction
摘要
申请公布号	US3369630(A)	申请公布日期	1968.02.20
申请号	US19650497847	申请日期	1965.10.19
申请人	HOWARD B. RICH, INC.	发明人	RICH HOWARD 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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