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发明名称
Treadboard
摘要
申请公布号
US2190195(A)
申请公布日期
1940.02.13
申请号
US19390259485
申请日期
1939.03.02
申请人
CHARLES SCHIVINC
发明人
SCHIVINC CHARLES
分类号
B60B39/12
主分类号
B60B39/12
代理机构
代理人
主权项
地址
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