Improvements in or relating to propelling pencils,申请号GB19300020328-传众专利搜索

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发明名称	Improvements in or relating to propelling pencils
摘要
申请公布号	GB351747(A)	申请公布日期	1931.07.02
申请号	GB19300020328	申请日期	1930.07.04
申请人	RICHARD WILLIAM JEFFREYS;FRANK CANNON	发明人
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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