The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2001
Filed:
Jul. 24, 2000
Philip Robare, Chicago, IL (US);
William Gale, Oak Park, IL (US);
Navigation Technologies Corp., Rosemont, IL (US);
Abstract
A navigation system and method in which geographic data are transmitted in portions, as needed, to end users' computing platforms from a central geographic database and used by the end users' computing platforms to provide navigation-related features to end users as the end users travel along roads in a geographic region. Each portion of data transmitted to each end user includes (a) data that represent road portions located in proximity to the road portion upon which the end user is located and that have a same rank as the road portion upon which the end user is located and (a) data that represent road portions having ranks other than the rank of the road portion upon which the end user is located but that are accessible within a predetermined threshold by vehicle from the road portions located in proximity to the road portion upon which the end user is located that have the same rank as the road portion upon which the end user is located, wherein a rank of a road corresponds to a classification such that roads having a higher rank are traversable generally faster and carry generally higher volumes of traffic than roads of a lesser rank.