发明名称 |
Method and apparatus for checking elevation |
摘要 |
An apparatus for checking elevation between reference markers. The apparatus includes a measuring device (e.g., a tape measure) that can measure the distance from an elevated location to the ground immediately below the location. A sighting device and a leveling device (e.g., a hand level) are secured to the distance-measuring device so that a remote reference marker can be sighted. The distance-measuring device is calibrated such that it measures the distance from the ground to the centerline of the sighting device.
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申请公布号 |
US6389709(B1) |
申请公布日期 |
2002.05.21 |
申请号 |
US20000521225 |
申请日期 |
2000.03.08 |
申请人 |
ENTHIOS CORPORATION;LUNDE SCOTT M. |
发明人 |
LUNDE SCOTT M. |
分类号 |
G01C5/00;(IPC1-7):G01B3/10 |
主分类号 |
G01C5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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