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发明名称
Electric clock
摘要
申请公布号
US2738447(A)
申请公布日期
1956.03.13
申请号
US19530330081
申请日期
1953.01.07
申请人
SANDBERG EUGENE S
发明人
SANDBERG EUGENE S.
分类号
H02M7/62
主分类号
H02M7/62
代理机构
代理人
主权项
地址
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