About 2 Trademarks found that are owned by Precision Navigation Incorporated

navigational instruments and instruments for determining the direction and magnitude of magnetic fields, in particular magnetometers for measuring magnetic fields, geomagnetic compasses, and electronic compasses having electrical output corresponding to measured magnetic fields, for use by individuals, for use in vehicles, and for use in or with devices and instruments where magnetic information feedback is appropriate for correction of parameters within the device or instrument

directional compasses