Underfloor duct system and method of making,申请号US19260117212-传众专利搜索

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发明名称	Underfloor duct system and method of making
摘要
申请公布号	US1758989(A)	申请公布日期	1930.05.20
申请号	US19260117212	申请日期	1926.06.21
申请人	WALKER HERVEY S	发明人	WALKER HERVEY S.
分类号	E04B5/48;H02G9/06	主分类号	E04B5/48
代理机构		代理人
主权项
地址

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