Extension attachment for ladders, scaffolds and the like,申请号US19360083655-传众专利搜索

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发明名称	Extension attachment for ladders, scaffolds and the like
摘要
申请公布号	US2057777(A)	申请公布日期	1936.10.20
申请号	US19360083655	申请日期	1936.06.05
申请人	HOBBS WILLIAM L	发明人	HOBBS WILLIAM L.
分类号	C10G7/00;E06C7/44	主分类号	C10G7/00
代理机构		代理人
主权项
地址

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