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:
May. 15, 1990
Filed:
Dec. 27, 1988
Takashi Yamada, Anjo, JP;
Aisin AW Co., Ltd., Aichi, JP;
Kabushiki Kaisha Shinsangyokaihatsu, Tokyo, JP;
Abstract
A route searching system having node data 3 representing information on positions and attributes of the same, intersection data 1 representing information on intersections, road data 2 representing information on roads, and a route searching section 4 for searching for the optimum route from the intersection data and the road data. Weighted information based on road circumstances is included in the road data, and weighing is performed in accordance with the weighted information with respect to possible routes searched by the route searching section to find the optimum route. This system enables the time taken for traveling along a selected course to be computed with reference to the weighted information and enables route searching to be performed in short period of time. Also, intersections to be passed without turning can readily be removed to prepare guidance data only from data necessary for guidance.