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发明名称
WORDPRINTER EDUCATIONAL AID
摘要
申请公布号
US3628453(A)
申请公布日期
1971.12.21
申请号
USD3628453
申请日期
1969.12.22
申请人
ROBERT C. JACKSON;JAMES C. MUELLER;EDGAR E. HARDY
发明人
ROBERT C. JACKSON;JAMES C. MUELLER;EDGAR E. HARDY
分类号
B41J3/36;G09B17/00;(IPC1-7):B41J1/20
主分类号
B41J3/36
代理机构
代理人
主权项
地址
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