发明名称 Magnetic marker assembly
摘要 A marker assembly including an elongated upright iron stake and a marker member mounted on an upper portion of the stake. The marker member includes a permanent magnet inside a housing. An elongated upright socket in the housing receives the upper portion of the stake with the magnet being exposed in the socket and engaging an upper end of the stake.
申请公布号 US3916821(A) 申请公布日期 1975.11.04
申请号 US19720264179 申请日期 1972.06.19
申请人 PIES, OTHMAR W. 发明人 PIES, OTHMAR W.
分类号 G01C15/04;G01V15/00;(IPC1-7):G01C15/06 主分类号 G01C15/04
代理机构 代理人
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