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发明名称
Typewriting machine
摘要
申请公布号
US1897699(A)
申请公布日期
1933.02.14
申请号
US19310529839
申请日期
1931.04.13
申请人
ROYAL TYPEWRITER COMPANY, INC.
发明人
HART HENRY J.
分类号
B41J11/22
主分类号
B41J11/22
代理机构
代理人
主权项
地址
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