Filter and the method of making the same,申请号US19390273018-传众专利搜索

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发明名称	Filter and the method of making the same
摘要
申请公布号	US2188488(A)	申请公布日期	1940.01.30
申请号	US19390273018	申请日期	1939.05.11
申请人	THE SILEX COMPANY	发明人	TALMADGE LOUIS H.
分类号	A47J31/44	主分类号	A47J31/44
代理机构		代理人
主权项
地址

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