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发明名称
Road marker
摘要
申请公布号
US1886721(A)
申请公布日期
1932.11.08
申请号
US19280298716
申请日期
1928.08.10
申请人
RUBBER PRODUCTS CORPORATION
发明人
O'BRIEN JAMES RAYMOND
分类号
E01F9/06
主分类号
E01F9/06
代理机构
代理人
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