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发明名称
Impulse clock
摘要
申请公布号
US1892710(A)
申请公布日期
1933.01.03
申请号
US19300475816
申请日期
1930.08.16
申请人
WILLIAM FRED KITCHENS
发明人
SMITH ROY F.
分类号
G04C13/10
主分类号
G04C13/10
代理机构
代理人
主权项
地址
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