Retractable swirl plate and vermin control guard for drain tile intakes,申请号US19580756043-传众专利搜索

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发明名称	Retractable swirl plate and vermin control guard for drain tile intakes
摘要
申请公布号	US2970697(A)	申请公布日期	1961.02.07
申请号	US19580756043	申请日期	1958.08.19
申请人	LARSON ELLSWORTH L;LARSON LAWRENCE L;LARSON ANDY M	发明人	LARSON ELLSWORTH L.;LARSON LAWRENCE L.;LARSON ANDY M.
分类号	E03F5/14;E03F7/06	主分类号	E03F5/14
代理机构		代理人
主权项
地址

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