Writing instrument with adjustable lead,申请号US19440565199-传众专利搜索

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发明名称	Writing instrument with adjustable lead
摘要
申请公布号	US2463345(A)	申请公布日期	1949.03.01
申请号	US19440565199	申请日期	1944.11.27
申请人	YOUNGQUIST CLARENCE R	发明人	YOUNGQUIST CLARENCE R.
分类号	B43K21/06	主分类号	B43K21/06
代理机构		代理人
主权项
地址

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