Pencil lead sharpeners,申请号US19540461830-传众专利搜索

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发明名称	Pencil lead sharpeners
摘要
申请公布号	US2857883(A)	申请公布日期	1958.10.28
申请号	US19540461830	申请日期	1954.10.12
申请人	PRATT EDMUND C	发明人	PRATT EDMUND C.
分类号	B43L23/00	主分类号	B43L23/00
代理机构		代理人
主权项
地址

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