| 摘要 |
<p>Multiple homing devices system that transmits corresponding multiple unique signals to a pre-setup mobile phone. The system comprises a set of homing devices, each of which transmitting a unique signal to said pre-setup mobile phone and a mobile phone that can receive, decode and monitor each of said unique signals from said set of signaling devices and can calculate and indicate proximity and direction of each device in said set of signaling devices respectively.</p> |
