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发明名称
Metal base for nickel clocks
摘要
申请公布号
US1785231(A)
申请公布日期
1930.12.16
申请号
US19280316640
申请日期
1928.11.02
申请人
THE E. INGRAHAM CO.
发明人
SIMPSON JOHN O.
分类号
G04B37/14
主分类号
G04B37/14
代理机构
代理人
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