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发明名称
Micrometric line spacer mechanism for typewriters
摘要
申请公布号
US2268933(A)
申请公布日期
1942.01.06
申请号
US19390291253
申请日期
1939.08.21
申请人
GRAHAM FRANK L
发明人
GRAHAM FRANK L.
分类号
B41J19/84
主分类号
B41J19/84
代理机构
代理人
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