Writing pad,申请号US19500188773-传众专利搜索

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发明名称	Writing pad
摘要
申请公布号	US2608771(A)	申请公布日期	1952.09.02
申请号	US19500188773	申请日期	1950.10.06
申请人	ERNEST SPARKS	发明人	SPARKS ERNEST
分类号	B43L1/12	主分类号	B43L1/12
代理机构		代理人
主权项
地址

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