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发明名称
Fractional line spacer for typewriters
摘要
申请公布号
US1807969(A)
申请公布日期
1931.06.02
申请号
US19280325821
申请日期
1928.12.13
申请人
ELECTROMATIC TYPEWRITERS, INC.
发明人
CRUMRINE CHESTER W.
分类号
B41J11/24
主分类号
B41J11/24
代理机构
代理人
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