Method of making roof ventilator,申请号US19620240085-传众专利搜索

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发明名称	Method of making roof ventilator
摘要
申请公布号	US3168780(A)	申请公布日期	1965.02.09
申请号	US19620240085	申请日期	1962.11.26
申请人	THE G. C. BREIDERT CO.	发明人	BREIDERT GEORGE M.
分类号	B21D53/00;F24F7/02	主分类号	B21D53/00
代理机构		代理人
主权项
地址

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