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发明名称
Playing court
摘要
申请公布号
US1862423(A)
申请公布日期
1932.06.07
申请号
US19280306416
申请日期
1928.09.17
申请人
KURT-WILLY OTTO
发明人
OTTO KURT-WILLY
分类号
E01C13/02;E01C13/06
主分类号
E01C13/02
代理机构
代理人
主权项
地址
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