Telecommunications – Transmitter and receiver at separate stations – Short range rf communication
Reexamination Certificate
2005-04-26
2005-04-26
Milord, Marceau (Department: 2682)
Telecommunications
Transmitter and receiver at separate stations
Short range rf communication
C455S041300, C455S556200, C455S575100, C455S085000, C455S426100, C455S552100, C455S569100, C455S556100, C455S553100, C455S557000, C379S114030
Reexamination Certificate
active
06885848
ABSTRACT:
Disclosed is an apparatus for preventing the loss of a portable telephone using a bluetooth communication and the control method thereof capable of preventing the loss of the portable telephone. According to the control method, the portable telephone periodically measures a power level of a radio frequency received from an earphone when a loss prevention mode is determined, and detects a calling state between the portable telephone and the earphone. The portable telephone transmits a warning signal data to the earphone if the power level of the radio frequency received from the earphone is below a predetermined level in a state that the calling state between the portable telephone and the earphone is detected. The earphone generates a warning sound if the warning sound signal is received from the portable telephone during a bluetooth radio communication with the portable telephone.
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Dilworth & Barrese LLP
Milord Marceau
LandOfFree
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