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发明名称
Relay timing ring
摘要
申请公布号
US2827596(A)
申请公布日期
1958.03.18
申请号
US19540443363
申请日期
1954.07.14
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
CUNNINGHAM JAMES M.
分类号
H04M3/12
主分类号
H04M3/12
代理机构
代理人
主权项
地址
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