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发明名称
Automatic case shifting attachment for typewriters
摘要
申请公布号
US2633965(A)
申请公布日期
1953.04.07
申请号
US19500168998
申请日期
1950.06.19
申请人
JOHNSTON DAVID K
发明人
JOHNSTON DAVID K.
分类号
B41J25/08
主分类号
B41J25/08
代理机构
代理人
主权项
地址
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