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发明名称
Line ruling attachment for typewriters
摘要
申请公布号
US2581167(A)
申请公布日期
1952.01.01
申请号
US19490115855
申请日期
1949.09.15
申请人
JOHN BOSQUET
发明人
BOSQUET JOHN
分类号
B41J29/28
主分类号
B41J29/28
代理机构
代理人
主权项
地址
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