Combined extension ladder and trestle,申请号US19330703511-传众专利搜索

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发明名称	Combined extension ladder and trestle
摘要
申请公布号	US2017563(A)	申请公布日期	1935.10.15
申请号	US19330703511	申请日期	1933.12.22
申请人	CANTELO JOHN S	发明人	CANTELO JOHN S.
分类号	E06C1/18;E06C1/39	主分类号	E06C1/18
代理机构		代理人
主权项
地址

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