05543789 is referenced by 437 patents and cites 12 patents.

The invention provides a method and system for providing route guidance information from a base unit to a remote unit in response to a request from the remote unit. The remote unit may be a mobile unit or a fixed unit. A query is formatted at the remote unit, the query including the request, and communicated from the remote unit to the base unit. The requested route guidance information is calculated at the base unit in response to the query, using a database located at the base unit. A response to the query is formatted at the base unit, the response including the route guidance information. The response is communicated from the base unit to the remote unit for display.

Title
Computerized navigation system
Application Number
8/265094
Publication Number
5543789
Application Date
June 24, 1994
Publication Date
August 6, 1996
Inventor
Randall B Jones
Downers Grove
IL, US
David A Behr
Roselle
IL, US
Agent
Alice O Martin
Assignee
Shields Enterprises
IL, US
IPC
G08G 1/123
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