Vacuum cleaning apparatus,申请号US19430511659-传众专利搜索

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发明名称	Vacuum cleaning apparatus
摘要
申请公布号	US2397980(A)	申请公布日期	1946.04.09
申请号	US19430511659	申请日期	1943.11.25
申请人	PETRL FREDERICK W	发明人	PETRL FREDERICK W.
分类号	A47L9/16	主分类号	A47L9/16
代理机构		代理人
主权项
地址

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