And Industrial Electronics CompanyMethod for precision dynamic differential positioningUS4894662 *Apr 14, 1986Jan 16, 1990Western Atlas International, Inc.Method and system for determining position on a moving platform, such as a ship, using signals from GPS satellitesUS4949268 *Sep 22, 1988Aug 14, 1990Kabushiki Kaisha Toyota Chuo KenkyushoLand vehicle navigation systemUS5119101 *May 20, 1991Jun 2