Offset, extendable, quick-release plumbness indicating apparatus

Omni range inclino-compass

Omnidirectional angle indicator

Omnidirectional torpedo level having magnetic mounts and...

One-man field survey instrument

Open circuit leveling measuring system

Optical sensor for measuring inclination angles

Orientation data generation method, orientation sensor unit...

Orientation data generation method, orientation sensor unit...

Orientation data generation method, orientation sensor unit...

Orientation measuring device

Orientation sensing apparatus

Orientation sensing in a multi part device

Orientation sensor

Orientation sensor

Orientation sensor

Orientation sensor utilizing intra-pattern property...

Orientation sensor utilizing intra-pattern property...

Orientation sensor utilizing intra-pattern property...

Orientation system