05724316 is referenced by 411 patents and cites 47 patents.

An audio entertainment/navigation system with updated time readings is provided especially for a mobile user. The navigation system receives GPS position information signals which are processed to determine current position latitude and longitude coordinates and direction of travel. A destination database includes a plurality of categorized destinations and corresponding destination position coordinates pertaining to the destinations. The destination database is stored on an interfacable memory card. A time change database is also included which contains time-related information such as time zone boundaries and special time change rules such as daylight saving time. The time-related information may be loaded into the system from an interfacable memory card. A time of day as referenced to a reference time and the date are also computed from the GPS signals. The time and date are compared with the time-related information so as to determine a current updated time and date which is used to periodically update the clock and may be displayed on a display. Also, a user may obtain a current time and date reading for a remote destination by entering the destination name or coordinates into the system.

GPS based time determining system and method
Application Number
Publication Number
Application Date
September 26, 1995
Publication Date
March 3, 1998
Randall T Brunts
Jimmy L Funke
Delco Electronics Corporation
G06F 15/50
G08G 1/12
G04C 11/02
G04B 19/22
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