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经营范围
发明名称
EXTENSION DEVICE
摘要
申请公布号
US3491446(A)
申请公布日期
1970.01.27
申请号
USD3491446
申请日期
1967.08.09
申请人
KEITH K. GRIFFITHS;JAMES D. MARTIN
发明人
KEITH K. GRIFFITHS;JAMES D. MARTIN
分类号
A61C17/20;(IPC1-7):A61C1/08
主分类号
A61C17/20
代理机构
代理人
主权项
地址
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