An improved ball-point pen with a retractable writing element,申请号GB19550030306-传众专利搜索

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发明名称	An improved ball-point pen with a retractable writing element
摘要
申请公布号	GB788257(A)	申请公布日期	1957.12.23
申请号	GB19550030306	申请日期	1955.10.24
申请人	MAX SCHMIDT	发明人
分类号	B43K24/06	主分类号	B43K24/06
代理机构		代理人
主权项
地址

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