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发明名称
FINGERING INDICATING MEANS
摘要
申请公布号
CA368630(A)
申请公布日期
1937.09.14
申请号
CAD368630
申请日期
申请人
L. C. SMITH AND CORONA TYPEWRITERS
发明人
MYRTLE R. KELLER
分类号
主分类号
代理机构
代理人
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