| Patents for G01C 21 - Navigation; Navigational instruments not provided for in groups (52,650) |
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| 11/27/1991 | EP0458019A2 Control- and display device for traffic information in a vehicle |
| 11/26/1991 | US5067249 Map scaling instrument |
| 11/24/1991 | WO1991018263A1 Device for determining the position of an object in relation to a straight reference line bounded by two end marks, especially to determine the position of a boat in relation to the starting line in sailing regattas |
| 11/24/1991 | CA2065387A1 Device for determining the position of an object in relation to a straight reference line bounded by two end marks, especially to determine the position of a boat in relation to the starting line in sailing regattas |
| 11/21/1991 | EP0363396B1 Process and device for determining the position of a land craft |
| 11/21/1991 | EP0214273B1 Configuration responsive descent rate warning system for aircraft |
| 11/19/1991 | US5067084 Inertial measurement unit with aiding from roll isolated gyro |
| 11/19/1991 | US5067083 Vehicle driving azimuth detecting apparatus for correcting a disturbed geomagnetic azimuth |
| 11/19/1991 | US5067082 Navigation apparatus |
| 11/19/1991 | US5067081 Portable electronic navigation aid |
| 11/19/1991 | US5065627 Three axis inertial measurement unit with counterbalanced, low inertia mechanical oscillator |
| 11/19/1991 | CA1292304C Relative position navigation system with means for computing syntheticazimuth |
| 11/14/1991 | DE4014932A1 Navigation aid esp. for microlight aircraft - giving actual and desired course display on map |
| 11/13/1991 | EP0456595A2 Method for guiding vehicle drivers to a predetermined target |
| 11/12/1991 | US5064152 Method of determining and controlling the attitude of a spin-stabilized satellite in an elliptical transfer orbit |
| 11/12/1991 | CA1292081C Method for storing a parcelwise divided digital data base as well as of addressing a data parcel in a mass memory, and apparatus for carrying out the method |
| 11/06/1991 | EP0377645B1 Process for recognizing curves and for determining the transverse acceleration in a vehicle |
| 10/30/1991 | EP0453726A2 Vehicle navigation apparatus |
| 10/30/1991 | EP0172221B1 Terrain advisory system |
| 10/29/1991 | US5062051 Method for observing by scanning a celestial body and for measuring an angular velocity of a space vehicle, observation system for its implementation, and space vehicle comprising same |
| 10/29/1991 | US5060592 Steering direction indicator for boats |
| 10/29/1991 | US5060392 North finding system |
| 10/29/1991 | US5060390 Navigation aid |
| 10/23/1991 | EP0452613A2 Image information display apparatus |
| 10/22/1991 | US5060175 Measurement and control system for scanning sensors |
| 10/22/1991 | US5060162 Vehicle in-situ locating apparatus |
| 10/22/1991 | US5059970 Navigational aid |
| 10/22/1991 | US5059965 Method of and device for selection or entry of a destination in a motor vehicle system |
| 10/22/1991 | US5058427 Accumulating altimeter with ascent/descent accumulation thresholds |
| 10/16/1991 | EP0451988A1 Heading detecting apparatus |
| 10/16/1991 | EP0451839A2 Direction finding apparatus |
| 10/15/1991 | US5058023 Vehicle position determining apparatus |
| 10/09/1991 | EP0450243A2 Electromagnetic position and orientation detector |
| 10/01/1991 | US5052799 Object orienting systems and systems and processes relating thereto |
| 09/25/1991 | EP0448060A2 Automatic travelling apparatus |
| 09/25/1991 | EP0448059A2 Automatic travelling apparatus |
| 09/25/1991 | EP0447488A1 Personal multi-purpose navigational apparatus and method for operation thereof |
| 09/19/1991 | WO1991014154A1 Navigation system |
| 09/19/1991 | DE4008460A1 Navigationssystem Navigation system |
| 09/19/1991 | DE4007999A1 Remote controlled projectile or missile - uses camera as sensor for holding missile at required height |
| 09/18/1991 | EP0446903A2 Automatic travelling apparatus |
| 09/18/1991 | EP0446902A2 Automatic travelling apparatus |
| 09/11/1991 | EP0445778A1 Angular velocity sensor |
| 09/11/1991 | EP0445719A2 Navigation apparatus for vehicles |
| 09/10/1991 | US5047777 Linear method of navigation |
| 09/10/1991 | US5047653 Device on board a moving vehicle to obtain signals representative of the relative speed of the vehicle with respect to an ambient fluid |
| 09/10/1991 | US5046360 Aerodynamic probe internal constructions |
| 09/10/1991 | CA1288865C Stabilization control circuit for vertical position in an inertial navigator |
| 09/04/1991 | EP0444738A2 Vehicle location system |
| 09/04/1991 | EP0277217B1 Spacecraft accelerometer auto-alignment |
| 09/03/1991 | US5046011 Apparatus for navigating vehicle |
| 08/29/1991 | DE4105180A1 Autonomous motor vehicle navigation system - records and plays back directional information using pulse trains to measure path lengths |
| 08/27/1991 | US5043902 Vehicular navigation apparatus |
| 08/27/1991 | US5042156 Method and apparatus for reducing measurement errors in a navigation triad |
| 08/21/1991 | CA2010518A1 Compucap rule for easy conversion of true course to compas course |
| 08/20/1991 | US5041983 Method and apparatus for searching for route |
| 08/14/1991 | EP0441489A2 Display system |
| 08/13/1991 | US5040122 Method and system to determine the position of a land vehicle during movement over a predetermined path |
| 08/07/1991 | EP0440105A2 Navigation system for vehicle |
| 08/07/1991 | EP0439543A1 A method of storage and retrieval of digital map data based upon a tessellated geoid system. |
| 08/06/1991 | US5038141 Configuration responsive descent rate warning system for aircraft |
| 07/31/1991 | EP0438947A1 On-board system for determining the position of an air vehicle and its applications |
| 07/30/1991 | WO1991011683A2 Navigation aid including map transparency holder |
| 07/30/1991 | US5036471 Apparatus for road path searching applicable to car navigation system and operation method thereof |
| 07/25/1991 | WO1991010879A1 Position sensor |
| 07/23/1991 | CA1286772C System for surveying fluid transmission pipelines and the like |
| 07/10/1991 | EP0436215A2 Lightweight missile guidance system |
| 07/10/1991 | EP0436213A2 Obstacle detection system |
| 07/09/1991 | US5031104 Adaptive in-vehicle route guidance system |
| 07/09/1991 | US5031103 Position detector for moving vehicle |
| 07/04/1991 | DE4041395A1 Rotating disc instrument indicating aircraft wind correction angle - uses rule of thumb formulae to achieve high accuracy ground speed calculation |
| 07/03/1991 | CN2080165U Guide instrument |
| 06/27/1991 | WO1991009375A1 Integrated vehicle positioning and navigation system, apparatus and method |
| 06/27/1991 | DE4033832A1 Touch-contact operating field for automobile navigation aid - has temporary display of switch pattern on screen used to display navigation map |
| 06/26/1991 | EP0434122A1 Method of displaying driving information intended for a driver of a vehicle on a display in said vehicle |
| 06/26/1991 | CN1052550A Aerodynamic probe internal constructions |
| 06/18/1991 | US5025401 Automotive mileage calculating apparatus |
| 06/18/1991 | US5025261 Mobile object navigation system |
| 06/18/1991 | CA1285042C Apparatus for displaying travel path |
| 06/16/1991 | WO1991009274A1 Aerodynamic probe internal constructions |
| 06/16/1991 | CA2069110A1 Aerodynamic probe internal constructions |
| 06/12/1991 | WO1991009275A2 Integrated vehicle positioning and navigation system, apparatus and method |
| 06/12/1991 | EP0431590A2 A CD-ROM retrieval apparatus |
| 06/12/1991 | CA2071831A1 Integrated vehicle positioning and navigation system, apparatus and method |
| 06/11/1991 | US5023798 Method of and apparatus for determining a position of a land vehicle |
| 06/11/1991 | US5022608 Lightweight missile guidance system |
| 06/05/1991 | EP0429952A2 Automatic landing system |
| 06/05/1991 | EP0429543A1 Directional information system |
| 06/02/1991 | CA2031133A1 Electromagnetic position and orientation sensor |
| 05/30/1991 | WO1991007640A1 Method of navigation and navigation device compensating for magnetic declination |
| 05/29/1991 | EP0428827A2 A satellite radio signal tracking method for GPS receivers |
| 05/16/1991 | DE3937921A1 Navigationsverfahren und -vorrichtung zur kompensation der ortsmissweisung Navigation method and apparatus for compensation of the local declination |
| 05/15/1991 | EP0427431A2 Navigation systems |
| 05/14/1991 | US5016007 Apparatus for displaying travel path |
| 05/08/1991 | EP0425763A1 A satellite radio signal tracking method for GPS receivers |
| 05/07/1991 | US5014205 Vehicle having an on-board navigation system |
| 05/07/1991 | US5014040 Personal locator transmitter |
| 04/30/1991 | US5012424 Multiple sensor system and method |
| 04/30/1991 | US5011288 Position control system for unmanned automated vehicle |
| 04/25/1991 | DE4033831A1 Navigation system esp. for motor vehicle - has independent system with correction derived from satellite system when signals received from three or more satellites |