Abrader attachment for writing instruments,申请号US19360073994-传众专利搜索

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发明名称	Abrader attachment for writing instruments
摘要
申请公布号	US2075932(A)	申请公布日期	1937.04.06
申请号	US19360073994	申请日期	1936.04.13
申请人	EHRMANN WILLIAM C F	发明人	EHRMANN WILLIAM C. F.
分类号	B43K25/02;B43K29/18	主分类号	B43K25/02
代理机构		代理人
主权项
地址

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