| Patents for G01C 17 - Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (3,922) |
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| 09/04/2001 | US6282803 Self calibration circuit for determining an accurate zero compensation for a fluxgate compass |
| 09/04/2001 | US6282802 Hand-held needleless compass |
| 08/22/2001 | EP1126240A1 Electronic instrument having a magnetic sensor |
| 08/22/2001 | CN1309338A Electronic instrument with magnetic sensor |
| 08/21/2001 | US6278461 Augmented reality vision systems which derive image information from other vision systems |
| 08/16/2001 | US20010013777 Electronic instrument having a magnetic sensor |
| 08/09/2001 | DE19955044A1 Verfahren zur Bestimmung der Orientierung einer definierten azimutalen Richtung einer Navigationseinrichtung und Einrichtungen zur Durchführung des Verfahrens A method for determining the orientation of a defined azimuthal direction of a navigation device, and means for carrying out the method |
| 08/01/2001 | EP1120629A1 Electronic azimuth meter and electronic time piece using such an electronic azimuth meter |
| 07/31/2001 | US6269306 System and method for estimating sensor errors |
| 07/17/2001 | US6262415 Orientation sensor system with high precision optical interrogation and dense multiplexing |
| 07/11/2001 | EP1114978A1 Three-dimensional homologous surveying method and the related instrument |
| 06/19/2001 | US6249721 Arrangement for detecting and evaluating yawing movements |
| 06/12/2001 | CA2171314C Electro-optic vision systems which exploit position and attitude |
| 06/05/2001 | US6243660 Digital compass with multiple sensing and reporting capability |
| 06/05/2001 | US6240647 Orienteering compass and distance measuring device |
| 05/23/2001 | EP1102084A2 Method to determine the orientation of the azimuth direction of a navigation apparatus |
| 05/08/2001 | US6227310 Method and apparatus for providing a magnetic direction reference |
| 05/02/2001 | EP1095318A1 Watch equipped with means for determining a location longitude |
| 04/19/2001 | WO2001027556A1 Digital compass with multiple sensing and reporting capability |
| 04/17/2001 | US6218831 Low power fluxgate circuit with current balance |
| 04/11/2001 | EP0826137B1 Process for determining the direction of the earth's magnetic field |
| 04/05/2001 | DE19946169A1 Navigation display device for e.g. wrist watches, shows direction to desired destination electronically via liquid crystal display, or mechanically or electromechanically via indicator from GPS coordinates |
| 04/03/2001 | US6212476 Apparatus to measure the earth's local gravity and magnetic field in conjunction with global positioning attitude determining |
| 03/28/2001 | EP1086357A2 Wireless compass for vehicles |
| 03/28/2001 | CN1063846C Double-chord four-guide-wheel symmetric spokeless wheel differential mechanism |
| 03/21/2001 | CN2424448Y 电子航向记录器 Electronic course recorder |
| 03/13/2001 | US6202035 System for determining time or direction for prayer |
| 03/07/2001 | CN2422619Y Multipurpose compass |
| 03/01/2001 | DE10029993A1 Optical device has computer that processes object distance value, which varies with focus setting; characteristic data for set object appear on information generator |
| 02/28/2001 | CN1062659C Wind speed indication equipment |
| 02/27/2001 | US6194897 Magnetic sensor apparatus |
| 02/21/2001 | CN2420614Y Compass suitable for blind person |
| 02/21/2001 | CN2420194Y Automatic indicator for identifying direction for car |
| 02/21/2001 | CN1062352C Method for correction for magneic deviation in single course and magnetic valve retaining deflector thereawith |
| 02/20/2001 | US6192315 Dual-calibrated compass |
| 02/14/2001 | EP1076223A2 Direction display device |
| 02/08/2001 | WO2001009567A1 Calibrating a magnetic compass with an angular rate gyroscope and a global positioning system receiver |
| 01/24/2001 | EP1070937A1 Orientation slate |
| 01/18/2001 | DE19932525A1 Method for E-compensating in electronic magnetic compasses detects a reading error caused by asymmetrically fitted soft iron without comparing with an external directional reference. |
| 01/16/2001 | US6173501 Compensation system for electronic compass |
| 01/04/2001 | WO2001001074A1 Optical device |
| 12/26/2000 | US6166686 Corrected magnetic compass |
| 12/26/2000 | US6166539 Magnetoresistance sensor having minimal hysteresis problems |
| 12/06/2000 | CN1275713A Digital magnetic compass system |
| 11/29/2000 | CN2408436Y Compass for flux door |
| 11/23/2000 | WO2000070361A1 Low power fluxgate circuit with current balance |
| 11/23/2000 | WO1999064894A3 Novel system and method for assisting impaired person in swimming |
| 11/14/2000 | US6145209 Illuminating device for a magnetic compass |
| 11/08/2000 | CN1272916A Electronic apparatus with azimuth meter and azimuth measuring method in this electronic apparatus |
| 11/07/2000 | US6141881 Electronic analogue compass |
| 11/01/2000 | CN2404099Y Position indicator |
| 10/31/2000 | US6140933 Rearview mirror assembly with internally mounted compass sensor |
| 10/19/2000 | WO2000062131A1 System for locating the mecca city by using the gps satellite location system |
| 10/18/2000 | CN1270305A Friction driven compass vehicle |
| 10/11/2000 | EP1043566A2 Vehicle compass compensation |
| 09/08/2000 | WO2000052661A1 Rearview mirror assembly with internally mounted compass sensor |
| 08/22/2000 | US6105265 Tilt-compensating indicator device for a compass |
| 08/16/2000 | CN2392166Y Laser horizontal circle |
| 08/09/2000 | EP1026477A1 Electronic compass calibration |
| 08/02/2000 | EP1024345A1 Electronic apparatus with azimuth meter and azimuth measuring method in this electronic apparatus |
| 08/02/2000 | EP0830567B1 Compass having a tilt-compensating indicator device |
| 08/01/2000 | US6094830 Inclination-compensating display device for a compass |
| 07/05/2000 | CN1054197C Compass |
| 07/04/2000 | US6084406 Half-cycle saturable-core magnetometer circuit |
| 06/28/2000 | CN2385314Y Mapping compass |
| 06/21/2000 | DE19959675A1 Cellular radio communication system, e.g. for GPS navigation system; has data storage unit to transmit information about variations in local magnetic field to each radio unit |
| 06/21/2000 | DE19855794A1 Personal navigation method e.g. used in building complex uses detected actual position and compass disc angular direction pulses compared with stored route for providing guidance directions to user via display |
| 06/06/2000 | US6070333 Electronic compass |
| 05/31/2000 | CN2380900Y 水平指示器 Level indicator |
| 05/30/2000 | US6069585 Personal direction finding apparatus |
| 05/16/2000 | US6064398 Electro-optic vision systems |
| 05/10/2000 | CN2377520Y High-accuracy compass |
| 04/26/2000 | EP0861416B1 SYSTEM FOR DETERMINING TIME and DIRECTION FOR PRAYER |
| 04/26/2000 | CN2375950Y Digital magnetic compass device |
| 04/19/2000 | EP0791169B1 Process for stabilising the direction indicated by magnetic compasses |
| 04/19/2000 | CN2374868Y Camera with compass |
| 04/19/2000 | CN2374847Y Regulatable navigation magnetic compass |
| 04/19/2000 | CN2374846Y Yellow Emperor Eight Diagrams vehicle |
| 04/18/2000 | US6049989 Three-dimensional homologous surveying method and the related instrument |
| 04/11/2000 | US6049761 Vehicular traveling direction measuring system |
| 04/05/2000 | CN2372661Y Anti-seismic logging magnetic angle meter |
| 04/04/2000 | US6047237 Compass precalibration method |
| 03/28/2000 | US6044315 Vehicle non-volatile memory system |
| 03/22/2000 | EP0986736A1 Inertial and magnetic sensors systems designed for measuring the heading angle with respect to the north terrestrial pole |
| 03/14/2000 | US6037936 Computer vision system with a graphic user interface and remote camera control |
| 03/02/2000 | DE19849554C1 Method to determine absolute position with displacement and angle transducers; involves using two mechanically coupled sensors with output signals with numbers of periods different by one |
| 03/01/2000 | CN1245890A Remote control correction method for shipping magnetic compass self-heterodyne |
| 02/29/2000 | US6031545 Vision system for viewing a sporting event |
| 02/22/2000 | US6028427 Magnetism sensor using a magnetism detecting device of a magnetic impedance effect type and control apparatus using the same |
| 02/17/2000 | DE19836532A1 Method to correct indicating faults of electronic magnetic compass caused by fixed or induced magnetism induced in vehicle; uses three vehicle magnetic field sensors and two inclinometers with field measurements in different orientations |
| 02/17/2000 | DE19836522A1 Method to correction course-indicating faults in electronic compasses produced by permanent vertical magnetism of vehicle for vehicle inclination after compensating for course-indicating faults produced by horizontal magnetism |
| 02/16/2000 | EP0979443A1 Graphical user interfaces for computer vision systems |
| 02/10/2000 | WO1999064819A3 Wireless compass for vehicles |
| 02/10/2000 | DE19835329A1 Compensating electronic magnetic compass with probe attached to vehicle by using magnetic field measurements at positions on vehicle forming linear equation system |
| 02/08/2000 | US6023229 Rearview mirror with internally-mounted compass sensor |
| 02/03/2000 | DE19834123A1 Method to compensate reading error, for electronic magnet compass in water craft, road vehicles or aircraft |
| 02/02/2000 | EP0977012A2 Hand-held compass with removable protective cover |
| 01/19/2000 | EP0972208A1 Magnetometer with coil and high permeabiliy core |
| 01/19/2000 | CN2359664Y Friction driving southward pointing cart |
| 01/18/2000 | CA2135383C Calibration method for a relative heading sensor |