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发明名称
Typewriting machine
摘要
申请公布号
US2175602(A)
申请公布日期
1939.10.10
申请号
US19370157741
申请日期
1937.08.06
申请人
HALL EDWIN S
发明人
HALL EDWIN S.
分类号
B41J7/02
主分类号
B41J7/02
代理机构
代理人
主权项
地址
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