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发明名称
Watchman's time recorder
摘要
申请公布号
US2098497(A)
申请公布日期
1937.11.09
申请号
US19360096001
申请日期
1936.08.14
申请人
JOHNSON AUSTIN C;WROBLE THEODORE M
发明人
JOHNSON AUSTIN C.;WROBLE THEODORE M.
分类号
G07C1/20
主分类号
G07C1/20
代理机构
代理人
主权项
地址
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