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发明名称
Permutation keyboard mechanism
摘要
申请公布号
US2232167(A)
申请公布日期
1941.02.18
申请号
US19380201305
申请日期
1938.04.11
申请人
BARBER-COLMAN COMPANY
发明人
MARCELLUS BROOKS
分类号
H04L13/16
主分类号
H04L13/16
代理机构
代理人
主权项
地址
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