04570227 is referenced by 166 patents and cites 5 patents.

A portable map display apparatus stores, in a memory, features of a plurality of points on a given map and features of routes connecting such points and, on receiving input signals concerning a given point of start and a given destination, sequentially displays, on an output device, the information on the optimum route to be followed in reaching the destination from the point of start.

Title
Portable map display apparatus
Application Number
6/407290
Publication Number
4570227
Application Date
August 11, 1982
Publication Date
February 11, 1986
Inventor
Kiyoshi Komoriya
Ibaraki
JP
Susumu Tachi
Ibaraki
JP
Agent
Schwartz & Weirieb
Assignee
Ministry of International Trade &
JP
Agency of Industrial Science & Technology
JP
IPC
G06F 15/50
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