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发明名称
Guide for correcting typewriting
摘要
申请公布号
US2444673(A)
申请公布日期
1948.07.06
申请号
US19450576495
申请日期
1945.02.06
申请人
PYNER ROBERT L
发明人
PYNER ROBERT L.
分类号
B41J29/26
主分类号
B41J29/26
代理机构
代理人
主权项
地址
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