Fountain pen with triplex writing point,申请号US19570689284-传众专利搜索

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发明名称	Fountain pen with triplex writing point
摘要
申请公布号	US2868171(A)	申请公布日期	1959.01.13
申请号	US19570689284	申请日期	1957.10.10
申请人	YASUO WATANABE	发明人	WATANABE YASUO
分类号	B43K5/18	主分类号	B43K5/18
代理机构		代理人
主权项
地址

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