06177905 is referenced by 398 patents and cites 7 patents.

A mobile user device, such as a personal digital assistant (PDA

100

), a wireless telephone, a car phone, or any other programmable device that the user generally has with him or her, is equipped with a global positioning system (GPS) receiver (

101

) and is programmable (

102

) by the user to alert the user to when he or she arrives with the device at a predetermined location (

252

), as well as to disclose (

101

) to the user whatever information (

263

) the user chose to associate with that location (e.g., a “to-do” list). The user can program in the geographical coordinates (

253

) of locations and location names (

252

), and thereafter refer to the locations by name. The user can also program in a range (

254

) around each location, so that his or her arrival within that range will trigger the alert for the location.

Title
Location-triggered reminder for mobile user devices
Application Number
9/207882
Publication Number
6177905 (B1)
Application Date
December 8, 1998
Publication Date
January 23, 2001
Inventor
Bryan J Welch
Northglenn
CO, US
Agent
David Volejnicek
US
Assignee
Avaya Technology
FL, US
IPC
G01S 5/02
View Original Source