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经营范围
发明名称
Safety marker
摘要
申请公布号
US2333273(A)
申请公布日期
1943.11.02
申请号
US19410379263
申请日期
1941.02.17
申请人
ROSCOE J. ARNOLD;RODNEY B. TAYLOR
发明人
SCANLON CHARLES D.
分类号
E01F9/012
主分类号
E01F9/012
代理机构
代理人
主权项
地址
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