Filter structures for vacuum cleaners,申请号US19520290139-传众专利搜索

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发明名称	Filter structures for vacuum cleaners
摘要
申请公布号	US2720277(A)	申请公布日期	1955.10.11
申请号	US19520290139	申请日期	1952.05.27
申请人	LEWYT CORPORATION	发明人	MEYERHOEFER CARL E.
分类号	A47L9/14	主分类号	A47L9/14
代理机构		代理人
主权项
地址

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