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发明名称
Writer's ring
摘要
申请公布号
US1879489(A)
申请公布日期
1932.09.27
申请号
US19310520111
申请日期
1931.03.04
申请人
RAY GROVER C
发明人
RAY GROVER C.
分类号
B43L15/00
主分类号
B43L15/00
代理机构
代理人
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地址
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