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发明名称
Highway marker
摘要
申请公布号
US2067698(A)
申请公布日期
1937.01.12
申请号
US19360063924
申请日期
1936.02.14
申请人
PURDUE RESEARCH FOUNDATION
发明人
HALL JOSEPH M.
分类号
E01F9/06
主分类号
E01F9/06
代理机构
代理人
主权项
地址
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