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发明名称
Personal timer
摘要
申请公布号
US2917892(A)
申请公布日期
1959.12.22
申请号
US19570681203
申请日期
1957.08.30
申请人
BLY AUSTIN H;ELLIOTT EVERETT E
发明人
BLY AUSTIN H.;ELLIOTT EVERETT E.
分类号
G04F3/02
主分类号
G04F3/02
代理机构
代理人
主权项
地址
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