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发明名称
Chalk holder
摘要
申请公布号
US2086174(A)
申请公布日期
1937.07.06
申请号
US19350056619
申请日期
1935.12.30
申请人
FRANK RUTZ
发明人
RUTZ FRANK
分类号
A63D15/16
主分类号
A63D15/16
代理机构
代理人
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