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:
Jun. 15, 1993
Filed:
Feb. 20, 1991
Shinichi Takemura, Saitama, JP;
Tsutomu Honda, Saitama, JP;
Kenichiro Kawasaki, Saitama, JP;
Isao Endo, Saitama, JP;
Shozaburo Sakaguchi, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A vehicle navigation apparatus comprises a self-contained positioning system, GPS positioning system, and a controller for performing arithmetic operation on the basis of the output of any one of the self-contained positioning system and the GPS positioning system so as to display various navigation information on a display. The controller corrects the bearing data based on the self-contained positioning system with respect to that based on the GPS positioning system if the bearing data of self-contained positioning system differs from that of the GPS positioning system by more than a predetermined value when a vehicle velocity determined on the basis of the position data from any one of the positioning systems exceeds a predetermined value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile