Automatic ground displacement monitoring device to support landslide early warning system (Patent No : DP000038351)

Manual ground displacement monitoring device to support landslide early warning system (Patent No : IDP000038434)

On-surface landslide movement early detector with digital data recorder (Patent No : IDP000038787)

Ground tilt change detector to support landslide early warning system (Patent No : IDP000038968)

Subsurface landslide movement monitoring in  ground crack (Patent No : IDP000039806)