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发明名称
Writing device
摘要
申请公布号
US1818383(A)
申请公布日期
1931.08.11
申请号
US19290406694
申请日期
1929.11.12
申请人
COWDIN COMPANY
发明人
COWDIN CHARLES ERNEST
分类号
B42D19/00
主分类号
B42D19/00
代理机构
代理人
主权项
地址
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