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| Number | Title | Issue Date |
| 5440923 | Drivable slope-sensitive unit for measuring curvature and crossfall of ground surfaces A method and an apparatus for measuring the curvature and the slope of ground surfaces in two different directions are disclosed. Use is made of a drivable slope-sensitive unit which emits electric signals relating to the crossfall, the hilliness, the hor... | 08/15/1995 |