Patent ID: 8727880

Claim:
A mobile magnetic field apparatus comprising: a signal generator device that generates a signal; at least one coil that generates a magnetic field; and a transmitter radio frequency processing device that receives and processes the signal by modulating the signal by at least one frequency and/or an identification code, and that outputs at least one transmitter signal to the at least one coil, wherein the magnetic field is modulated by said at least one frequency and/or identification code, the at least one coil transmits data modulated onto the magnetic field, the data including at least one of position data of another mobile magnetic field apparatus, orientation data of the another mobile magnetic field apparatus, movement data of the another mobile magnetic field apparatus, measurement data of the mobile magnetic field apparatus, and measurement data of the another mobile magnetic field apparatus, and the mobile magnetic field apparatus is configured to: wirelessly transmit and wirelessly receive the data to and from the another mobile magnetic field apparatus.