Patent ID: 6891471
Filing Date: 2005-05-10
Classification: G08B

Abstract:
1. An object tracking device (OTD) for establishing a wireless link with compatible devices having RF receiver/transmitter means for transmitting and receiving unique self-identification codes (IDs), said OTD comprising: RF circuit means for transmitting and receiving RF signals; user interface means for interfacing with a user, said interfacing comprising audio and visual signaling to the user and permitting user inputs to the OTD; alarm means for producing an alarm signal; memory means for storage of identification codes (ID) including at least one unique ID for self-identification; and processor means for processing received RF signals and user inputs, management of said memory and control of said alarm means, wherein said OTD establishes a wireless link with a plurality of said compatible devices by receiving the ID of each of said plurality of compatible devices and storing said ID in said memory means and transmitting its self-identification ID to each of said compatible devices for storage therein and said OTD terminates said wireless link with a particular device by erasing an ID associated with the particular device from memory and transmitting its self-identification ID to the particular device for removal therefrom, whereby said OTD is responsive to RF signals from compatible devices whose IDs are stored in said memory.