Marking element for mechanical pencils,申请号US19390266268-传众专利搜索

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发明名称	Marking element for mechanical pencils
摘要
申请公布号	US2269950(A)	申请公布日期	1942.01.13
申请号	US19390266268	申请日期	1939.04.06
申请人	MCPHEE NATHANIEL H	发明人	MCPHEE NATHANIEL H.
分类号	B43K21/08	主分类号	B43K21/08
代理机构		代理人
主权项
地址

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