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发明名称
Data indicator
摘要
申请公布号
US2032304(A)
申请公布日期
1936.02.25
申请号
US19330654299
申请日期
1933.01.30
申请人
LEWIS PADGETT BENJAMIN
发明人
PADGETT BENJAMIN LEWIS
分类号
G09B19/18
主分类号
G09B19/18
代理机构
代理人
主权项
地址
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