| Patents for G01C 17 - Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (3,922) |
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| 03/23/1994 | EP0587934A1 Compass swinging using position independent angle measuring system |
| 03/23/1994 | EP0587796A1 Electronic direction finder |
| 03/22/1994 | US5297065 Magnetic transient detection and calibration technique for an auto-calibrating compass |
| 03/22/1994 | US5297063 Method for selecting calibration data for an auto-calibrating compass |
| 03/21/1994 | EP0587796A4 Electronic direction finder. |
| 02/23/1994 | CN2157490Y Direction box |
| 02/23/1994 | CN2157489Y Map ranging compass |
| 02/22/1994 | US5287628 Omni range inclino-compass |
| 02/17/1994 | DE4234651C1 Verfahren zur Ermittlung des Gierwinkels eines Fahrzeuges Method for determining the yaw angle of a vehicle |
| 02/15/1994 | US5287297 Magnetic direction finder with correcting circuit |
| 02/15/1994 | US5287295 Method and apparatus for calibrating an electronic compass to account for alignment errors in the compass windings |
| 02/01/1994 | US5283743 Vehicle-direction measuring apparatus |
| 02/01/1994 | US5282318 Position sensor |
| 01/19/1994 | CN2153775Y Technological car traffic guide gradiometer |
| 01/04/1994 | US5276626 Direction finding method and apparatus for correcting magnetization of a vehicle |
| 01/04/1994 | US5274928 Compass mounting apparatus |
| 01/04/1994 | US5274927 Compass apparatus |
| 12/15/1993 | EP0573730A1 Improvement to compass |
| 12/14/1993 | US5270545 External compass module for night vision devices |
| 12/14/1993 | US5269065 Compass including means for displaying constellation data |
| 11/25/1993 | WO1993023721A1 Calibration method for a relative heading sensor |
| 11/16/1993 | US5262838 Apparatus and means for binocular, switchable to binocular rangefinder without light loss |
| 11/10/1993 | CN2145980Y Floating compass |
| 11/03/1993 | CN2145367Y Compass cabable for listening |
| 10/26/1993 | US5255442 Vehicle compass with electronic sensor |
| 10/20/1993 | CN2144296Y Multifunctional portable folding compass |
| 10/20/1993 | CN1077529A Multifunction verniec compass |
| 10/19/1993 | US5254987 Output signal processing unit of a fluxgate sensor |
| 10/19/1993 | US5253424 Flux-gate sensor mounting and method |
| 10/14/1993 | WO1993020407A1 Automatic calibration of magnetic compasses |
| 10/14/1993 | CA2133313A1 Automatic calibration of magnetic compasses |
| 10/13/1993 | EP0565177A1 Device for determining the orientation of a vehicle |
| 10/12/1993 | US5253225 Compass watch of the mechanically or electromechanically driven type and bezel specifically intended for such a watch |
| 10/06/1993 | CN2143323Y Ball compass |
| 10/05/1993 | US5251139 Vehicular traveling direction measuring system |
| 09/29/1993 | EP0554430A4 Guidance device |
| 09/29/1993 | EP0363370B1 A roll-independent magnetometer system |
| 09/29/1993 | CN2142962Y Photoelectric direction indicator |
| 09/22/1993 | CN2142562Y Direction indicator |
| 08/31/1993 | US5241270 Electronic compass using hall-effect sensors |
| 08/11/1993 | EP0554430A1 Guidance device |
| 08/10/1993 | US5235514 Apparatus for estimating current heading using magnetic and angular velocity sensors |
| 08/10/1993 | US5233759 Compensating magnetic compass |
| 07/08/1993 | WO1993013386A1 Vehicle compass with electronic sensor |
| 07/07/1993 | EP0550386A1 Tilt compensating compass |
| 06/08/1993 | US5216816 Compass |
| 05/26/1993 | CN2134639Y Ring-like ball pen compass |
| 05/13/1993 | WO1993009400A1 Reference pointer for a compass display |
| 05/12/1993 | EP0541224A1 Vehicle-direction detection method |
| 05/12/1993 | EP0541223A1 Vehicle-direction detecting apparatus |
| 04/29/1993 | WO1993008450A1 Thin film compass and method for manufacturing the same |
| 04/13/1993 | US5201128 Miniature gimbal mounted magnetic field detectors |
| 04/06/1993 | US5199178 Thin film compass and method for manufacturing the same |
| 04/06/1993 | CA1315861C Modular observation instrument with range finder |
| 04/05/1993 | CA2079160A1 Electronic direction finder |
| 04/01/1993 | WO1993006434A1 Process for compensating a magnetic interference field in a vehicle |
| 03/18/1993 | WO1993005362A1 A direction indicator |
| 03/09/1993 | US5191792 Instrument for indicating altitude or direction |
| 03/01/1993 | WO1993005474A1 Guidance device |
| 03/01/1993 | CA2094506A1 Guidance device |
| 02/23/1993 | US5187872 Automatic calibration of magnetic compasses |
| 02/23/1993 | US5187871 Underwater navigation device |
| 02/16/1993 | US5187437 Magnetic field detector for detecting earth's magnetic field |
| 01/21/1993 | DE4124002A1 Dynamic error compensation device for electronic magnetic compass - stores compensation current for vertical ship field, applies short current pulses producing vertical field intensity, and multiplies ratio of vertical to transverse field change by compensation field |
| 01/13/1993 | EP0522861A1 GPS direction detecting device with true magnetic circle and geomagnetic sensor |
| 01/05/1993 | US5175936 Electronic compass |
| 12/23/1992 | EP0519630A2 Location detecting apparatus |
| 12/22/1992 | US5173709 Electronic direction finder |
| 12/15/1992 | US5172322 Vehicular traveling direction measuring system with automatic center coordinate position correction |
| 12/15/1992 | US5172056 Magnetic field transmitter and receive using helmholtz coils for detecting object position and orientation |
| 12/15/1992 | US5170566 Means for reducing interference among magnetometer array elements |
| 12/10/1992 | WO1992021936A1 Attitude sensor |
| 12/08/1992 | US5170354 Vehicular traveling direction measuring system with automatic center coordinate position correction |
| 12/06/1992 | CA2043974A1 Device for the elimination of the anomaly deviation in magnetic compasses |
| 12/04/1992 | WO1992021990A1 Electronic direction finder |
| 11/25/1992 | EP0514403A1 Electro optical apparatus |
| 11/24/1992 | US5165269 Electronic flux gate compass calibration technique |
| 11/19/1992 | EP0513972A2 Vehicle-direction measuring method |
| 11/19/1992 | EP0513039A1 Navigation aid including map transparency holder. |
| 11/19/1992 | EP0513019A1 Position sensor. |
| 11/18/1992 | CN2122374U Corrector for getting lost |
| 11/11/1992 | EP0512317A2 Method for tracking the correction value of a magnetic field sensor attached to a vehicle |
| 11/10/1992 | US5161311 Calibration and compensation of an electronic compass system |
| 10/27/1992 | US5157841 Portable electronic compass |
| 10/14/1992 | EP0508213A2 Method for detecting and evaluating data for determination of non-rectilinear vehicle motion |
| 10/14/1992 | CN2118968U Multi-purpose direction indicator for driver's cab |
| 10/13/1992 | CA1308551C Electronic digital compass |
| 09/29/1992 | US5151872 Method and apparatus for correcting the output of an onboard vehicle terrestrial magnetism sensor |
| 09/29/1992 | US5151862 Vehicular traveling direction measuring system |
| 09/29/1992 | US5151753 Non-parallax optical sighting instrument |
| 09/23/1992 | CN2116890U Mecca direction instrument |
| 09/16/1992 | EP0503214A1 Orientation device |
| 09/15/1992 | US5146687 Compass |
| 09/08/1992 | US5146231 Electronic direction finder |
| 08/05/1992 | CN2112139U Universal-purpose rule |
| 07/29/1992 | EP0496508A1 Heading detecting method |
| 07/21/1992 | US5131155 Apparatus and method for measuring forward direction of vehicle |
| 07/21/1992 | US5131154 Method and apparatus for compensating a magnetic compass |
| 07/08/1992 | CN2109548U High precision magnetic compasses |
| 06/16/1992 | US5122960 Locator for a moving body |