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发明名称
Keyboard
摘要
申请公布号
US1977829(A)
申请公布日期
1934.10.23
申请号
US19310560715
申请日期
1931.09.02
申请人
MARTIAL LOBIT JEAN
发明人
LOBIT JEAN MARTIAL
分类号
B41B11/18
主分类号
B41B11/18
代理机构
代理人
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