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摘要
申请公布号
US2095683(A)
申请公布日期
1937.10.12
申请号
US19320637082
申请日期
1932.10.10
申请人
SIMPLEX TIME RECORDER COMPANY
发明人
WATKINS EDWARD G.;HOBBY HAROLD E.;DELL JAMES A.
分类号
G07C1/06
主分类号
G07C1/06
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