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发明名称
Chalk holder
摘要
申请公布号
US2507928(A)
申请公布日期
1950.05.16
申请号
US19470730486
申请日期
1947.02.24
申请人
WILLIAM N. LARSON, JR.
发明人
JR. WILLIAM B. ONLEY,
分类号
B43K23/016
主分类号
B43K23/016
代理机构
代理人
主权项
地址
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