Magnetic writing pad,申请号US19450638105-传众专利搜索

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发明名称	Magnetic writing pad
摘要
申请公布号	US2497332(A)	申请公布日期	1950.02.14
申请号	US19450638105	申请日期	1945.12.29
申请人	TEETOR MACY O	发明人	TEETOR MACY O.
分类号	B43L5/02	主分类号	B43L5/02
代理机构		代理人
主权项
地址

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