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发明名称
Boundary marker
摘要
申请公布号
US2610502(A)
申请公布日期
1952.09.16
申请号
US19450623539
申请日期
1945.10.20
申请人
CARLSON AXEL S
发明人
CARLSON AXEL S.
分类号
E01F9/019;E04H13/00;G01C15/06
主分类号
E01F9/019
代理机构
代理人
主权项
地址
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