| Patents for G01C 21 - Navigation; Navigational instruments not provided for in groups (52,650) |
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| 04/25/1991 | DE4033829A1 Service info. system e.g. for hotel booking or aircraft navigation - has map and service data storage devices accessed by computer controlled by selection device |
| 04/25/1991 | DE4033668A1 Navigation system e.g. for motor vehicle - is switchable between modes displaying map, instantaneous and stored positions and map and instantaneous position only |
| 04/24/1991 | EP0313589B1 Stabilization control circuit for vertical position in an inertial navigator |
| 04/24/1991 | EP0231277B1 Precision platform pointing controller for a dual-spin spacecraft |
| 04/17/1991 | EP0253816B1 Navigation process for vehicles |
| 04/17/1991 | EP0233941A4 Ground proximity warning system for use with aircraft having degraded performance |
| 04/16/1991 | US5007289 Three axis inertial measurement unit with counterbalanced, low inertia mechanical oscillator |
| 04/10/1991 | EP0420890A1 Road vehicle locating system |
| 04/04/1991 | DE4029426A1 Measuring curvature of road with markings - ascertaining changes in yaw angle, angle between vehicle axis and marking and road direction from constant speed vehicle |
| 04/04/1991 | DE3931979A1 Finding geographical position by digital measurement of height of sun - storing digital time of day with digital sun height measurement to ascertain longitude and latitude for navigation |
| 04/04/1991 | DE3931289A1 Polar coordinates register for destination on street map - provides distance vector between start and destination points on transparent disc with segments divided into angles |
| 04/03/1991 | EP0420384A2 Spacecraft attitude control with avoidance constraint |
| 03/26/1991 | US5003306 Apparatus for displaying current location |
| 03/26/1991 | CA2026025A1 System for identifying selected locations |
| 03/20/1991 | EP0417077A1 Process and device for selection or input of the destination in motor vehicle navigation systems. |
| 03/20/1991 | EP0269655A4 Warning system for tactical aircraft |
| 03/19/1991 | US5001647 Inertial transformation matrix generator |
| 03/19/1991 | US5001476 Warning system for tactical aircraft |
| 03/19/1991 | US5000111 Trail marking device |
| 03/19/1991 | CA1281542C Axial alignment aid for remote control operations and related method |
| 03/13/1991 | EP0242396B1 Synchronous fm digital detector |
| 03/12/1991 | US4999783 Of a vehicle |
| 03/07/1991 | WO1991002997A1 Inertial stabilizing system |
| 03/06/1991 | EP0415681A2 Inertial transformation matrix generation |
| 03/05/1991 | US4996776 Method and device for determining the heading with wind (or with current) of an air (or sea-going) vehicle |
| 02/27/1991 | EP0414027A1 Procedure and device for the heading calculation |
| 02/26/1991 | US4996645 Vehicle navigation device with reproduction of a selected map element according to a predetermined representation standard |
| 02/25/1991 | WO1991002943A1 Navigation apparatus and method |
| 02/20/1991 | EP0190345B1 Ground proximity warning system for use with aircraft having degraded performance |
| 02/19/1991 | US4994974 Touch sensitive navigation system |
| 02/19/1991 | US4994971 System for setting up and keeping up-to-date datafiles for road traffic |
| 02/19/1991 | US4994681 Device for detecting the position of a moving body, in particular an aircraft, in a plane |
| 02/19/1991 | US4993274 Gyroscope system |
| 02/19/1991 | CA1280302C Gyrocompass navigation system for land vehicles |
| 02/13/1991 | EP0412791A2 Monitoring and predicting road vehicle/road surface conditions |
| 02/12/1991 | US4992947 Vehicular navigation apparatus with help function |
| 02/07/1991 | DE3925378A1 Navigation method for vehicle with electronic compasses - matching parameters of elliptical locus to earths magnetic field horizontal vector |
| 02/05/1991 | US4991126 Electronic-automatic orientation device for walkers and the blind |
| 02/05/1991 | US4989466 Gyroscopically stabilized sensor positioning system |
| 01/29/1991 | US4989151 Navigation apparatus and matching method for navigation |
| 01/29/1991 | US4987684 Wellbore inertial directional surveying system |
| 01/24/1991 | DE3923506A1 Navigation device with three-axis measurement angle - has sensors on each axis, determines distance and direction without artificial aids such as radio beacons |
| 01/24/1991 | DE3923313A1 Guidance information system for road vehicle - has route entered into computer system and comparison made with vehicle tachometer output |
| 01/24/1991 | DE3922697A1 Double autonomous navigation system developed from gyro compass - uses additional acceleration sensors and mathematical model-based integration program in computer |
| 01/22/1991 | US4987413 Aircraft terrain warning system with configuration modified warning and improved mode switching |
| 01/22/1991 | US4986121 Apparatus for measuring the vertical motion of a floating platform |
| 01/22/1991 | CA1279391C Passive ranging method and apparatus |
| 01/16/1991 | EP0408409A2 Board computer system with multifunction display selection |
| 01/09/1991 | EP0406946A1 Method of displaying navigation data for a vehicle in an image of the vehicle environment, a navigation system for performing the method, and a vehicle comprising a navigation system |
| 01/08/1991 | US4984168 Method and apparatus for determining a route between a starting point and a destination |
| 01/08/1991 | US4983980 Satellite radio signal tracking method for GPS receivers |
| 01/08/1991 | CA1278846C Vehicle land navigating device |
| 01/02/1991 | EP0406061A1 Apparatus attached to a moveable device to obtain signals representative of the speed of the device relative to a fluid, and measurement system incorporating such apparatus |
| 01/02/1991 | EP0405795A2 Method and apparatus for a target determining apparatus having increased range |
| 01/02/1991 | EP0405623A2 System for inspecting a dust proofing property |
| 01/01/1991 | US4982359 System and method for recognizing vehicle position on elevated freeway |
| 01/01/1991 | US4982332 Road data generating method for use in an on-board navigation system |
| 12/13/1990 | WO1990015307A1 Vehicle navigation system |
| 12/11/1990 | US4977509 Personal multi-purpose navigational apparatus and method for operation thereof |
| 12/11/1990 | US4976163 Reactionless actuator-gimbal system |
| 12/11/1990 | US4976039 Navigation aid |
| 12/05/1990 | CN1010710B Automatic calibration for accelerometer of spacecraft |
| 12/04/1990 | US4975709 Wake plotter apparatus |
| 12/04/1990 | CA1277401C Method for determining the heading of an aircraft |
| 11/28/1990 | EP0399670A2 Airborne computer generated image display systems |
| 11/27/1990 | CA1277043C Apparatus storing a representation of topological structures and methods of building and searching the representation |
| 11/25/1990 | CA2016359A1 Airborne computer generated image display system |
| 11/22/1990 | EP0397892A1 Method for determining the coordinates of stars for preparation of a star catalogue |
| 11/22/1990 | DE4015927A1 Control system for television monitor in vehicle |
| 11/14/1990 | EP0396867A2 Navigation procedure |
| 11/14/1990 | EP0396861A2 Navigation procedure |
| 11/14/1990 | EP0396558A1 Process for inputting starting and destination points into navigation systems. |
| 11/13/1990 | US4970652 System and method for displaying present position for moving object |
| 11/13/1990 | US4969271 Map reading and plotting instrument |
| 11/13/1990 | CA1276264C System for navigating a free ranging vehicle |
| 11/06/1990 | US4967479 Position relocation device |
| 10/31/1990 | EP0394517A1 Vehicle navigation system |
| 10/30/1990 | US4967064 Method and apparatus for a target determining apparatus having increased range |
| 10/25/1990 | DE3250014C2 Navigation system e.g. for tank |
| 10/24/1990 | EP0393935A2 Vehicle location detecting system |
| 10/24/1990 | EP0393632A2 Apparatus for road path searching applicable to car navigation system and operation method thereof |
| 10/23/1990 | US4965574 Variable-brightness display for use in a navigation system for a vehicle |
| 10/23/1990 | US4965573 Forward looking windshear detection system |
| 10/18/1990 | DE3912108A1 Vehicle with orientation system - has link to weapon or radar alignment gyro for correction and improved performance |
| 10/17/1990 | EP0392448A1 Procedure for the determination of the angular error of a magnetic field sensor |
| 10/17/1990 | EP0392104A1 Inertial navigation system |
| 10/16/1990 | US4964052 Navigation device for use in a vehicle |
| 10/16/1990 | US4963865 Apparatus for displaying travel path |
| 10/16/1990 | US4963864 Apparatus for displaying travel path |
| 10/11/1990 | DE3910945A1 Redundant integrated navigation method for freely navigating vehicles in the industrial field |
| 10/10/1990 | EP0391647A2 Calibration apparatus of angular velocity sensor in self-contained navigational system |
| 10/09/1990 | US4962458 Route planner device |
| 10/03/1990 | EP0390052A2 Landmark recognition system and process |
| 10/03/1990 | EP0389946A2 Device for correlated information display |
| 09/27/1990 | DE3910194A1 Control system for guiding road users |
| 09/26/1990 | EP0389327A2 System for measuring the position of a mobile arrangement along a straight line and its application to robots |
| 09/26/1990 | EP0389318A2 Procedure for helping navigation and improved terrestrial navigation system |
| 09/19/1990 | EP0388174A2 Navigational aid |
| 09/14/1990 | CA2012154A1 Navigational aid |
| 09/04/1990 | US4954986 Method and apparatus for storing digital data representing a topological network |