Accessory for underfloor duct systems,申请号US19290347199-传众专利搜索

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发明名称	Accessory for underfloor duct systems
摘要
申请公布号	US1809613(A)	申请公布日期	1931.06.09
申请号	US19290347199	申请日期	1929.03.15
申请人	WALKER HERVEY S	发明人	WALKER HERVEY S.
分类号	H02G3/18	主分类号	H02G3/18
代理机构		代理人
主权项
地址

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