172255 ⎘
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
Sub-classes:INDOOR LOCATION POSITION SYSTEM AND METHOD
#2INTERFERENCE AREA INFORMATION OUTPUT APPARATUS, INTERFERENCE AREA INFORMATION OUTPUT SYSTEM, INTERFERENCE AREA INFORMATION OUTPUT METHOD, AND RECORDING MEDIUM
#3Location determination system having mesh infrastructure to reduce power consumption
#4Unmanned underwater vehicle (UUV) based underwater communications network including short-range navigation device and related methods
#5Indoor location position system and method
#6FPGA-based real-time processing system and method applied to underwater acoustic positioning and realizing reconfigurability and multiple output
#7Location determination system having mesh infrastructure to reduce power consumption
#8Device, system, and method for controlling the focus of a laser to induce plasmas that emit signals with high directivity
#9Location system using ultrasound
#10INFORMATION PROVISION APPARATUS AND INFORMATION PROVISION SYSTEM
#11Ultrasonic locationing system using a doubly symmetrical transmission sequence
#12METHOD AND STRUCTURE FOR POSITION DETECTION
#13Driver indentification using vehicle approach vectors
#14METROLOGY METHOD AND DEVICE FOR CALIBRATING THE GEOMETRY OF A NETWORK OF UNDERWATER ACOUSTIC BEACONS
#15Ultrasound-based localization of client devices with inertial navigation supplement in distributed communication systems and related devices and methods
#16APPARATUS FOR TRANSMITTING POSITIONING SIGNAL AND METHOD FOR INDOOR POSITIONING USING THE SAME
#17Home network of connected consumer devices
#18HOME NETWORK OF CONNECTED CONSUMER DEVICES
#19Acoustic absolute position encoder and method
#20Filtering discrete time signals using a notch filter
#21Guided underwater object
#22Synchronization of optical signaling beacons
#23Systems and methods for locating a mobile phone in a vehicle