1
Haruhisa Tamai, Tatsuhiko Abe: Navigation system. Zexel Corporation, Thomas R Morrison, March 1, 1994: US05291412 (87 worldwide citation)

A vehicle navigation system computes an optimal route from stored map data. Where the vehicle deviates from the optimal route, either by mistake or by choice, the driver can command computation of a new optimal route. The driver may choose whether or not to permit U-turns on the new route, thereby i ...


2
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 ...


3
Haruhisa Tamai, Tatsuhiko Abe: Navigation system with off-route detection and route recalculation. Zexel Corporation, Thomas R Morrison, November 16, 1993: US05262775 (67 worldwide citation)

Where a vehicle deviates from a calculated optimal route, the system displays a message indicating the vehicle's deviation. The driver of the vehicle commands computation of a new optimum route. The system selects a new starting point from a point substantially ahead of the vehicle, recomputes the o ...


4
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 ...


5
Haruhisa Tamai, Tatsuhiko Abe: Navigation system for guiding a vehicle along a precomputed optimal route. Zexel Corporation Diahatsu Nissan Ikebukuro, Thomas R Morrison, March 1, 1994: US05291414 (63 worldwide citation)

When a vehicle has deviated from a computer-determined optimal route from a starting point to a destination, a navigation system warns the vehicle driver that he is off the optimal route, picks an appropriate direction for continued travel, selects a new starting point, and computes a new optimal ro ...


6
Tatsuhiko Abe: Storage medium for map information for navigation system and system for offering map information for navigation system. Zexel Corporation, Fish & Richardson, May 7, 1996: US05515284 (58 worldwide citation)

A storage medium for map information for a navigation system includes an IC memory chip or an IC memory card of a small memory capacity. This storage medium stores detailed map information of a limited region including part of a highway network and information of the highway network covering a prede ...


7
Takao Fujii, Tatsuhiko Abe: Navigation system. Zexel Corporation, Christopher R Pastel, Alfred W Froebrich, Thomas R Morrison, August 27, 1996: US05550538 (51 worldwide citation)

A navigation system mounted on a vehicle computes in advance an optimal route from a starting point to a destination. When the vehicle travels off the optimal route, the navigation system detects an off-route deviation. When an off-route deviation is detected, the system computes a restoration route ...


8
Takao Fujii, Tatsuhiko Abe: Navigation system. Zexel Corporation, Harold L Burstyn, Thomas R Morrison, March 28, 1995: US05402120 (43 worldwide citation)

A navigation system mounted on a vehicle displays a primary direction indication image on a display unit. This primary direction indication image has a proximal portion that represents a road along which the vehicle is now moving and a direction indication portion that represents a road which the ve ...


9
Masami Shibazaki, Tatsuhiko Abe: Navigation system for use in vehicle. Zexel Corporation, Fish & Richardson, December 27, 1994: US05377113 (40 worldwide citation)

In a navigation system for use in a vehicle, an administrative district and a first and a second roads are inputted by an input device. In the inputted administrative districts, an intersection formed by the inputted first and second roads is determined. The determined intersection is provided as at ...


10
Hidekazu Oshizawa, Tatsuhiko Abe: Vehicle-mounted navigation system. Zexel Corporation, Thomas R Morrison, George J Brandt Jr, May 9, 1995: US05414630 (36 worldwide citation)

A vehicle-mounted navigation system initially computes an optimal route from a starting point to a destination. A microcomputer computes the total distance the vehicle has travelled from a signal obtained from an axle sensor and computes the bearing of the vehicle (azimuth) from a signal obtained fr ...