INTERNALLY SPIRALED DUCT AND METHOD OF INSTALLATION,申请号US19890397740-传众专利搜索

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发明名称	INTERNALLY SPIRALED DUCT AND METHOD OF INSTALLATION
摘要
申请公布号	US5087153(A)	申请公布日期	1992.02.11
申请号	US19890397740	申请日期	1989.08.23
申请人	ARNCO CORPORATION	发明人	WASHBURN, ROBERT B.
分类号	G02B6/44;G02B6/46;H02G1/06;H02G1/08;H02G3/04;H02G9/04;H02G9/06	主分类号	G02B6/44
代理机构		代理人
主权项
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