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经营范围
发明名称
Typewriting machine
摘要
申请公布号
US2182433(A)
申请公布日期
1939.12.05
申请号
US19370152846
申请日期
1937.07.09
申请人
ROYAL TYPEWRITER COMPANY, INC.
发明人
HART HENRY JOSEPH
分类号
B41J11/24
主分类号
B41J11/24
代理机构
代理人
主权项
地址
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