International Business Machines Corporation

Symbol Technologies, LLC

Ronald Einar Bjorklund

Raj Bridgelall

Robert Thomas Cato

Narayan Nambudiri

Richard Watson

Charles Furedy

William Derouchey

Multi-tier system for digital radio communication. The multi-tier system has a first-tier base station with relatively long-range radio and has a second-tier base station with relatively short-range, low power and cheaper radios. The system can be more versatilely configured to meet demands of various applications. The application may include data capture using bar code readers, radio frequency readers and other automatic data capture devices. The system may also be used to control hotel door locks, individual room temperature control, remote video monitoring&#x2014;all without having to wire and with much flexibility given the two types of radios employed.

Wireless communication system for telephonic calls

Multi-tier wireless communications architecture, applications and methods

A wearable computer communicates with its display device via an optical link. The optical link may utilize different colored LEDs and corresponding photodetectors for transmitting and receiving the video and control signals to and from the computer and the hand-held display package. The wearable computer may communicate with a local area network by a radio communications link. The use of two antennas mounted and associated with the wearable computer eliminates any notch within a propagation pattern emanated from the antennas.

Wearable computer

Growing community of inventors

Bahama, NC, United States of America

Ronald Einar Bjorklund