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发明名称
Playground device
摘要
申请公布号
US1769199(A)
申请公布日期
1930.07.01
申请号
US19290334201
申请日期
1929.01.22
申请人
ROSS BAXTER ARTHUR
发明人
BAXTER ARTHUR ROSS
分类号
A63G11/00
主分类号
A63G11/00
代理机构
代理人
主权项
地址
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