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发明名称
Typewriter support
摘要
申请公布号
US2251198(A)
申请公布日期
1941.07.29
申请号
US19400351452
申请日期
1940.08.05
申请人
ONEAL FRANK E
发明人
ONEAL FRANK E.
分类号
A47B21/02
主分类号
A47B21/02
代理机构
代理人
主权项
地址
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