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US 5,440,559 AGranted
Portable wireless communication device
AssigneeSeiko Communications Holding N.V.
InventorGarold B. Gaskill
Life of this patent
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AssigneeSeiko Communications Holding N.V.
InventorGarold B. Gaskill
Estimating the term…
A portable communication device which also has an infrared transceiver. A portable communication device can automatically establish infrared communication sessions with another portable communication device or desktop computer having an infrared transceiver. The portable communication device and the other device may exchange textual and graphical information, as well as the current time, and then reconcile the newly received information with that information in possession before the communication session began. Multiple portable communication devices and computers may communicate, while conserving battery power, using a time division multiplexing scheme where the infrared transceivers are active during a short, periodic time slots. Multiple communication session may overlap in time as long as they are not active during the same time slot.
A method for a personal communication device and a second device to communicate, where the personal communication device includes a receiver and the second device includes a short-range transmitter, the method comprising:
A method of communication between a computer and a personal communication device, where the personal communication device includes a first receiver and a second receiver, and where the computer includes a first means for communicating with the first receiver and a second means for communicating with the second receiver, the method comprising the steps of:
Dependencies are inferred from the claim text.