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发明名称
Finger flex device
摘要
申请公布号
US2501919(A)
申请公布日期
1950.03.28
申请号
US19460660936
申请日期
1946.04.10
申请人
FRANK SAAM
发明人
SAAM FRANK
分类号
G09B15/06
主分类号
G09B15/06
代理机构
代理人
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地址
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