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发明名称
Keyboard
摘要
申请公布号
US2541823(A)
申请公布日期
1951.02.13
申请号
US19460652054
申请日期
1946.03.05
申请人
LOBIT JEAN M
发明人
LOBIT JEAN M.
分类号
B41B11/14
主分类号
B41B11/14
代理机构
代理人
主权项
地址
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