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发明名称
Roller skate
摘要
申请公布号
US2168820(A)
申请公布日期
1939.08.08
申请号
US19380208009
申请日期
1938.05.14
申请人
EDSTROM WILLARD H
发明人
EDSTROM WILLARD H.
分类号
A63C17/22
主分类号
A63C17/22
代理机构
代理人
主权项
地址
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