×

Navigation device for displaying dated map data

  • US 7,185,021 B2
  • Filed: 11/26/2001
  • Issued: 02/27/2007
  • Est. Priority Date: 05/18/2001
  • Status: Expired due to Fees
First Claim
Patent Images

1. A navigation device for displaying dated map data, comprising:

  • map storing means for storing the map data for a plurality of years;

    specifying means for specifying a specific year of the map data to be displayed and specifying specific data items from the map data that is to be emphasized when displayed;

    first display editing means for reading the map data of the specific year from said map storing means, and editing the map data to be displayed;

    second display editing means for reading map data of a different year from said map storing means, and editing the map data to be displayed; and

    displaying means for displaying the edited map data of the specific year and the edited map data of a different year;

    wherein the edited map data from the specific year and the edited map data from the different year are superposed on said displaying means at the same time; and

    wherein the superposed map data, includes at least one of said emphasized data items specified by said specifying means from a specific year, and normal data items from the different year.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×