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发明名称
Electric clock
摘要
申请公布号
US1937529(A)
申请公布日期
1933.12.05
申请号
US19310556369
申请日期
1931.08.11
申请人
POOLE ARTHUR F
发明人
POOLE ARTHUR F.
分类号
G04C3/02
主分类号
G04C3/02
代理机构
代理人
主权项
地址
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