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:
Jul. 24, 1990
Filed:
Oct. 20, 1988
Shuzo Moroto, Anjo, JP;
Koji Sumiya, Anjo, JP;
Shouji Yokoyama, Anjo, JP;
Mitsuhiro Nimura, Anjo, JP;
Akimasa Nanba, Anjo, JP;
Aisin AW Co., Ltd., Anjo, JP;
Abstract
A navigation apparatus having road system data 6 which represents information of connections and coordinates of intersections and roads between intersections, a travel distance sensor 2, steering angle sensor 3, a present position calculating module 4 for calculating the present position with a unit distance between an intersection and the terminal intersection of a going-out road selected at the former intersection. The apparatus is further provided with a module 15 for generating data on the direction of traveling to a destination point at respective intersections, and a guidance outputting module 5. Traveling direction data is made in response to inputting of the destination point, the present position is determined by selecting a going-out road with the present position calculating module with respect to each intersection, and guidance data on the traveling direction at the terminal intersection of the present road is thereafter output. When a present position is input, the present position is calculated from data on the corresponding road, the travel distance, and the steering angle. Similarly, at the terminal intersection of this road, another road extending in the traveling direction is selected from the road system data. The present position is also calculated with respect to this road.