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经营范围
发明名称
TEACHING DEVICE
摘要
申请公布号
US3468037(A)
申请公布日期
1969.09.23
申请号
USD3468037
申请日期
1966.11.25
申请人
RICHARD J. WARNEKE
发明人
RICHARD J. WARNEKE
分类号
G09B3/06;(IPC1-7):G09B3/02;G09B19/00
主分类号
G09B3/06
代理机构
代理人
主权项
地址
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