Improvements in filter frame,申请号GB19450003219-传众专利搜索

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发明名称	Improvements in filter frame
摘要
申请公布号	GB579637(A)	申请公布日期	1946.08.09
申请号	GB19450003219	申请日期	1945.02.08
申请人	THE SILEX COMPANY	发明人
分类号	A47J31/043	主分类号	A47J31/043
代理机构		代理人
主权项
地址

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