Tether Technologies, Inc.

Qwizdom, Inc.

George M Niederauer

Scott Craig Thielman

Keith M Brown

Keith W Kirkwood

Edgar R Neely

Darin Beamish

John D Suryan

Matthew D Darval

An item loss prevention system for protecting from the loss of items from a user, and more specifically to an electronic device utilizing a wireless connection between a remote unit attached to an item, such as a set of one or more keys, and a host or belt unit attached to the user, to prevent the loss of the item. The system includes magnetic sensors between the item and the belt, which are Hall type magnetic sensors, coupled with an accelerometer. With the additional input from the accelerometer, an alarm activates when the item, such as a key, is separated at a distance from the belt or host unit. Additionally, the key unit can attach to an unpairing station to re-set the remote unite for re-pairing to another host unit.

Wireless item loss prevention system

An item loss prevention system for protecting from the loss of items from a user, and more specifically to an electronic device utilizing a wireless connection between a remote unit attached to an item, such as a set of one or more keys, and a host or belt unit attached to the user, to prevent the loss of the item. The system includes magnetic sensors between the item and the belt, which are Hall type magnetic sensors. An alarm activates when the item attached to the remote unit, such as a key is separated from the host unit. A multiple of additional host units and the remote units pairs can operate properly in proximity to each other, and are tuned to respond to rolling average signal strength monitoring, to indicate a separation distance requiring an alarm to the user.

A wireless audience response system can have a host unit, presenter device, and a plurality of audience response units with keypads, with the host unit being communicatively coupled to a computer. In some embodiments, the audience response units can be used to execute functions using application programs within the computer remotely. Also, in other embodiments, the audience response units track delay times required for transmitting input data, with the delay times being usable in comparing response times at the host unit.

Audience response systems, methods and apparatus

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Seattle, WA, United States of America

George M Niederauer