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发明名称
Typewriting machine
摘要
申请公布号
US1942305(A)
申请公布日期
1934.01.02
申请号
US19310539557
申请日期
1931.05.23
申请人
ELECTROMATIC TYPEWRITERS, INC.
发明人
PETZ JOHN L.
分类号
B41J3/00
主分类号
B41J3/00
代理机构
代理人
主权项
地址
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