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发明名称
Chronometric instrument
摘要
申请公布号
US2259309(A)
申请公布日期
1941.10.14
申请号
US19370178177
申请日期
1937.12.04
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
HIBBARD FRANK H.
分类号
G04D7/12
主分类号
G04D7/12
代理机构
代理人
主权项
地址
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