Method of making alpha stepladder,申请号US19300502548-传众专利搜索

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发明名称	Method of making alpha stepladder
摘要
申请公布号	US1954545(A)	申请公布日期	1934.04.10
申请号	US19300502548	申请日期	1930.12.15
申请人	ULINE WALTER C	发明人	ULINE WALTER C.
分类号	B21D39/06;E06C1/16;E06C7/08	主分类号	B21D39/06
代理机构		代理人
主权项
地址

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