Abstract: A transparent metal mesh is used as an antenna element and is disposed over a graphical display so that the graphical display can be seen through the transparent metal mesh. A radio circuit is coupled to the metal mesh to receive radio signals using the transparent metal mesh. In some embodiments the radio circuit can also transmit signals using the transparent metal mesh as an antenna.

Abstract: A wearable alert device includes an audio transducer and driver circuit that allows selection of either a high or low volume setting for driving the transducer. The driver circuit is operable in a single ended mode for low volume and a double ended mode for high volume. The single ended mode holds one terminal of the transducer low while the other is driven in correspondence with a clock signal, while the double ended mode drives one terminal in correspondence with the clock signal and the other terminal is inverted from the clock signal. The transducer is activated in response to an alert event, and can be driven according to a profile or pattern.

Abstract: A system of an alert puck, a mobile communication device, and an alert server for facilitating a VOIP session with the mobile communication device responsive to an emergency event triggered by the alert puck. The alert puck comprises a housing enclosing a sealed volume, a power supply and control circuitry that includes a personal area network (PAN) interface. The mobile communication device comprises an operating system, an alert application executing upon the operating system, and a wireless transceiver. The alert server contacts a set of one or more previously defined contact devices, conveys an emergency message, and facilitates the VOIP session with the alert application, when a button is pressed on the alert puck.