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发明名称
EDUCATIONAL ELECTRICAL CIRCUIT TOY
摘要
申请公布号
US3466760(A)
申请公布日期
1969.09.16
申请号
USD3466760
申请日期
1966.08.08
申请人
ROBERT D. VANEK
发明人
ROBERT D. VANEK
分类号
G09B23/18;(IPC1-7):G09B23/18;G09B23/06
主分类号
G09B23/18
代理机构
代理人
主权项
地址
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