Combination photographic etching knife and sharpener,申请号US19400356224-传众专利搜索

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发明名称	Combination photographic etching knife and sharpener
摘要
申请公布号	US2239372(A)	申请公布日期	1941.04.22
申请号	US19400356224	申请日期	1940.09.10
申请人	PRATT JESSE G	发明人	PRATT JESSE G.
分类号	B24D15/06	主分类号	B24D15/06
代理机构		代理人
主权项
地址

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