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发明名称
Gear-driving device
摘要
A gear-driving device that allows the user to create an interlocking moving gear display that is coordinated with the subject matter in a book or on a page.
申请公布号
US6821182(B2)
申请公布日期
2004.11.23
申请号
US20020195332
申请日期
2002.07.15
申请人
INNOVATIVE USA, INC.
发明人
POLICK PETER
分类号
G09B1/00;(IPC1-7):A63H33/38
主分类号
G09B1/00
代理机构
代理人
主权项
地址
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