Mobile navigator

Patent 4470119 Issued on September 4, 1984. Estimated Expiration Date:

July 6, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Automatic vehicle monitoring system
Patent #: 4079322
Issued on: 03/14/1978
Inventor: Lawrence , et al.

Area navigation system including a map display unit for establishing and modifying navigation routes
Patent #: 4086632
Issued on: 04/25/1978
Inventor: Lions

Apparatus for vehicle position indication
Patent #: 4139889
Issued on: 02/13/1979
Inventor: Ingels

Motor vehicle map display system
Patent #: 4312577
Issued on: 01/26/1982
Inventor: Fitzgerald

Apparatus for positioning a body by means of a magnetic field Patent #: 4316253
Issued on: 02/16/1982
Inventor: Posseme

Inventors

Assignee

Nippondenso Co., Ltd.

Application

No. 06/395339 filed on 07/06/1982

US Classes:

701/208, For use in a map data base system340/990, With map display340/995.1, Map display342/451, By computer342/452, By plotting table353/12, With or for vehicle701/221, With correction by noninertial sensor73/178RNAVIGATION

Examiners

Primary: Chin, Gary

Attorney, Agent or Firm

Cushman, Darby & Cushman

International Classes

G01C 21/36 (20060101)
G01C 21/30 (20060101)
G01C 21/28 (20060101)
G01C 21/34 (20060101)

Foreign Application Priority Data

1981-07-07 JP

Abstract

A mobile navigator comprises a distance detector for generating a running distance signal, an azimuth detector for generating a progression azimuth detecting signal, a CRT display for indicating the current position of an automotive vehicle, a microcomputer for calculating the current position of the vehicle from the distance detecting signal and the progression azimuth detecting signal and supplying the current position signal to the display, and a memory in which is stored a plurality of map data, earth's magnetic field declination information different for each area in association with the map data, and earth's magnetic field strength information.