172261 ⎘
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 ultrasonic, sonic or infrasonic waves; Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional transducers or transducer systems spaced apart, i.e. path-difference systems
Sub-classes:APPARATUSES, METHODS AND COMPUTER PROGRAMS FOR LOCATING MOBILE DEVICES BY USING PHOTOACOUSTICALLY-GENERATED AUDIO SIGNALS
#2Range-finding and object-positioning systems and methods using same
#3Range-finding and object-positioning systems and methods using same
#4Range-finding and object-positioning systems and methods using same
#5Method for positioning underwater objects and system for the implementation thereof
#6Method for detecting position of mobile body
#7MOBILE DEVICE POSITIONING
#8Arrangement for, and method of, accurately locating products in a noisy venue
#9Ultrasonic locationing interleaved with alternate audio functions
#10Acoustic positioning system and method
#11Underwater acoustic positioning system
#12System and method for extending GPS to divers and underwater vehicles
#13Apparatus and method for detecting position of mobile robot