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发明名称
Selective filing and finding system
摘要
申请公布号
US2134715(A)
申请公布日期
1938.11.01
申请号
US19350044285
申请日期
1935.10.09
申请人
GRIFFIN ROBERT O
发明人
GRIFFIN ROBERT O.
分类号
G06K21/02
主分类号
G06K21/02
代理机构
代理人
主权项
地址
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