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发明名称
Jeweler's tag
摘要
申请公布号
US1742982(A)
申请公布日期
1930.01.07
申请号
US19290348967
申请日期
1929.03.21
申请人
WITTSTEIN CHARLES T
发明人
WITTSTEIN CHARLES T.
分类号
G09F3/12
主分类号
G09F3/12
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