172249 ⎘
Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves; Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information using pulse modulation, e.g. pulse frequency modulation
LOW-FREQUENCY RADIO NAVIGATION SYSTEM
#2Low-frequency radio navigation system
#3Coarse and fine compensation for frequency error
#4METHODS AND SYSTEMS FOR PROVIDING POSITIONING INFORMATION TO AIRCRAFT
#5INFORMATION PROCESSING SYSTEM, INFORMATION PROCESSING METHOD, MANAGEMENT DEVICE, AND PROGRAM
#6Low-frequency radio navigation system
#7Ultra wideband dynamic positioning method and system thereof
#8Low-frequency radio navigation system
#9Aviation transponder
#10Geo-reference based positioning of a mobile device
#11Single burst single satellite beacon localization
#12Low-power X band beacon transponder
#13Local navigation system
#14User path determining system and method therefor
#15Geo-reference based positioning of a mobile device
#16Radar device, radar positioning system, radar positioning method, and computer readable media storing radar positioning program
#17User path determining system and method therefor
#18PROXIMITY MONITORING
#19System for determining the location of a data storage library robot and methods of determining the same
#20Personal safety and locator device
#21Impact energy powered golf ball transmitter
#22System and method for monitoring airspace
#23System and method for determining the location of a moving object in a secluded space