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发明名称
Typewriter keyboard
摘要
申请公布号
US1828939(A)
申请公布日期
1931.10.27
申请号
US19290394506
申请日期
1929.09.23
申请人
METHOD OSTREY JOSEPH
发明人
OSTREY JOSEPH METHOD
分类号
B41J5/10
主分类号
B41J5/10
代理机构
代理人
主权项
地址
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