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发明名称
Electrically driven metronome
摘要
申请公布号
US2150967(A)
申请公布日期
1939.03.21
申请号
US19370122062
申请日期
1937.01.23
申请人
FREDERICK FRANZ
发明人
FRANZ FREDERICK
分类号
G04F5/02
主分类号
G04F5/02
代理机构
代理人
主权项
地址
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