1
Haruhisa Tamai, Tatsuhiko Abe: Navigation system for guiding a vehicle along a precomputed optimal route. Zexel Corporation Daihatsu Nissan Ikebukuro, Thomas R Morrison, March 1, 1994: US05291413 (75 worldwide citation)

A navigation system prevents a vehicle from deviating from a new optimal route immediately after the new optimal route has been computed following the first deviation of the vehicle from an original optimal route. The system does this by determining the present location of the vehicle and searching ...


2
Haruhisa Tamai, Tatsuhiko Abe: Navigation system with off-route detection and route recalculation. Zexel Corporation Daihatsu Nissan, Thomas R Morrison, Harold R Burstyn, April 12, 1994: US05303159 (63 worldwide citation)

A vehicle navigation system computes an optimal route for a journey. When the system detects that a vehicle has deviated from the optimal route, information that tells the driver of the deviation of the vehicle is displayed. When the driver turns on a recomputation command switch after reading the i ...


3
Masataka Ishikawa: Method and apparatus for correcting drift errors in an angular rate sensor. Zexel Corporation Daihatsu Nissan, Thomas R Morrison, March 22, 1994: US05297028 (39 worldwide citation)

An angular rate sensor for a vehicle navigation system stores an environmental temperature and a related null voltage each time the vehicle stops. The pairs of data points are stored in a non-volatile look-up table for use during vehicle motion. During vehicle motion, the environmental temperature i ...