조인창

System and method for point of interest service

조인창, 2006 .

System and Method for Exchanging of Location Information

김영기, 유응재, 이재영, 2002 .

System and Method for Navigation Service Using Mobile Identification Number

이재영, 김영우, 이재승, 2003 .

Traffic Information Collection Method Using Navigation System

김영기, 유응재, 이재영, 2002 .