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发明名称
Graphophone clock
摘要
申请公布号
US1785121(A)
申请公布日期
1930.12.16
申请号
US19270239496
申请日期
1927.12.12
申请人
HOLLOWAY JOHN H
发明人
HOLLOWAY JOHN H.
分类号
G04B21/00
主分类号
G04B21/00
代理机构
代理人
主权项
地址
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