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发明名称
Playing surface
摘要
申请公布号
US1970639(A)
申请公布日期
1934.08.21
申请号
US19300482413
申请日期
1930.09.17
申请人
WINKLEMAN EDWARD J
发明人
WINKLEMAN EDWARD J.
分类号
E01C13/06
主分类号
E01C13/06
代理机构
代理人
主权项
地址
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