Ladder hoisting attachment,申请号US19490099735-传众专利搜索

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发明名称	Ladder hoisting attachment
摘要
申请公布号	US2628071(A)	申请公布日期	1953.02.10
申请号	US19490099735	申请日期	1949.06.17
申请人	WILLIAMS JAMES N	发明人	WILLIAMS JAMES N.
分类号	B66D3/04	主分类号	B66D3/04
代理机构		代理人
主权项
地址

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