Patents
Sitemap › G01 - Measuring; Testing › G01C - Measuring distances, levels or bearings; Surveying; Navigation; Gyroscopic instruments; Photogrammetry or videogrammetry › G01C 17 - Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes
Patents for G01C 17 - Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes (3,922)
01/2000
01/13/2000WO2000002101A1 Watch equipped with means for determining a location longitude
01/11/2000US6014610 Navigation system and method
01/04/2000US6009629 Process for determining the direction of the earth's magnetic field
12/1999
12/29/1999WO1999067596A1 Electronic apparatus with azimuth meter and azimuth measuring method in this electronic apparatus
12/16/1999WO1999064894A2 Novel system and method for assisting impaired person in swimming
12/16/1999WO1999064819A2 Wireless compass for vehicles
11/1999
11/30/1999US5995913 Method of stabilizing the horizon of magnetic compasses
11/30/1999US5995000 Wireless compass for vehicles
11/25/1999DE19823148A1 Method for electronic magnetic compass remote transmission to assess or adjust coupling between magnetic sensor and magnetic compass
11/24/1999EP0958486A1 Geomagnetic field direction measuring system
11/18/1999WO1999058933A1 Apparatus for measuring magnetic declination using gps
11/11/1999DE19820526A1 Process for correction of reading errors of remote course indicators for a compass placed on a ship or vehicle
11/09/1999US5982176 Geomagnetic direction sensor
11/04/1999WO1999056079A1 Zero compensation calibration circuit for fluxgate compass
11/02/1999US5975007 Combined whistle and environmental instruments
10/1999
10/07/1999WO1999050619A1 Inertial and magnetic sensors systems designed for measuring the heading angle with respect to the north terrestrial pole
09/1999
09/14/1999US5953683 Sourceless orientation sensor
09/08/1999CN1227916A Electronic compass
09/07/1999US5946813 Method and device for determining correction parameters
08/1999
08/03/1999US5931177 Valves
07/1999
07/28/1999CN2330978Y Geographical compass observation aiming device
07/20/1999US5924212 Electronic compass
06/1999
06/23/1999CN2325760Y Electronic automatic locator
06/09/1999EP0920637A2 Navigation system and method
06/02/1999EP0918920A1 Method and apparatus for providing a magnetic direction reference
05/1999
05/19/1999EP0916926A1 Direction indicating compasses
05/14/1999WO1999023453A1 Electronic analogue compass
05/05/1999CN1216104A Method for determining correction parameters
04/1999
04/28/1999CN2316633Y Driving structure for ancient Chinese with wooden figure always pointing to south
04/27/1999US5897223 Stabilized platform system for camera
04/21/1999CN2315534Y Detector for pigeon positioning ability
04/07/1999EP0907067A2 Method for filtering the measured data of a magnetic field sensor
04/07/1999EP0704047B1 Direction indicator for navigation
04/07/1999CN2313205Y 地质罗盘仪 Geological compass
03/1999
03/23/1999US5884577 Direction gauge using shared and unshared segments
03/17/1999EP0901609A1 Method and device for determining correction parameters
03/17/1999EP0901436A1 Arrangement for detecting and evaluating yawing movements
03/16/1999US5883861 Timepiece associated with a compass and a sighting device
03/10/1999EP0900361A1 Personal direction finding apparatus
03/02/1999US5878370 Vehicle compass system with variable resolution
02/1999
02/17/1999CN2308074Y Gimbal for compass
01/1999
01/21/1999WO1998048292A3 Navigation system and method
01/13/1999EP0890847A2 Apparatus for determining the earth magnetic field, in particular in a vehicle navigation system
01/04/1999CA2209574A1 Device for determining direction and measuring distance
12/1998
12/23/1998CN1202615A Electronic automatic direction finding function
12/08/1998CA2189800C Transparency holder for navigation aid
12/02/1998EP0881503A2 Magneto-impedance effect element and magnetic head, electronic compass and autocanceller using the element
11/1998
11/18/1998CN1199191A Timepiece associated with compass and sighting device
10/1998
10/29/1998WO1998048292A2 Navigation system and method
10/29/1998CA2253052A1 Navigation system and method
10/27/1998US5828984 Data processing method for an electronic compass system
10/21/1998CN2295196Y Direction finder
10/21/1998CN2295195Y Direction finder
10/08/1998WO1998044358A1 Magnetometer with coil and high permeabiliy core
10/06/1998US5818226 Magnetic sensor having a coil with varying turns along the length of a bobbin
10/01/1998WO1998043044A1 A device for indicating direction
09/1998
09/29/1998US5815411 Electro-optic vision system which exploits position and attitude
09/23/1998EP0866309A2 Method and apparatus for calibrating a vehicle compass
09/08/1998US5802727 For use in a vehicle
09/02/1998EP0861416A1 System for determining time or direction for prayer
08/1998
08/13/1998WO1998035206A1 Method and device for determining correction parameters
08/13/1998WO1998035205A1 Geomagnetic field direction measuring system
08/11/1998US5793208 Excited magnetic sensor with latch
08/05/1998CN1189891A Method of stabilizing the horizon of magnetic compasses
07/1998
07/29/1998EP0855599A2 Electronic compass
07/29/1998CN2286862Y Portable self-aid direction checking device for travelling
07/28/1998US5786849 Marine navigation I
07/16/1998DE19651476A1 Geological compass for determining surface position relative to earth gravity and earth magnetic field
06/1998
06/18/1998DE19704956C1 Earth magnetic field direction measuring method for orientation or navigation purposes
06/18/1998DE19704853C1 Correction parameter evaluation method for on-board vehicle navigation system
06/17/1998EP0847518A1 Method of stabilizing the horizon of magnetic compasses
06/10/1998EP0722601A4 Electro-optic vision systems which exploit position and attitude
06/09/1998US5764055 Magnetism sensor using a magnetism detecting device of a magnetic impedance effect type and control apparatus using the same
06/02/1998US5761094 Vehicle compass system
06/02/1998US5758658 Compact human range of motion measurement system
05/1998
05/26/1998US5757184 Magnetic field detection apparatus with bilateral electrical switch for inverting magnetic sensor current
05/26/1998US5755036 Compass device with light attenuating mask
05/19/1998US5752322 Gimballed ouroboros compass device with digital logic
05/13/1998CN1181808A Process for determining the direction of the earth's magnetic field
05/12/1998US5749150 Direction indicator for navigation
05/05/1998US5747997 Spin-valve magnetoresistance sensor having minimal hysteresis problems
04/1998
04/21/1998US5742521 Vision system for viewing a sporting event
04/14/1998US5739431 Miniature magnetometer-accelerometer
04/09/1998WO1997046892A3 Magnetoresistance sensor having minimal hysteresis problems
04/08/1998EP0834746A1 Gimbaled magnetometer with inductive coupling
04/07/1998US5737226 Vehicle compass system with automatic calibration
03/1998
03/25/1998EP0830568A1 Inclination-compensating display device for a compass
03/25/1998EP0830567A1 Tilt-compensating indicator device for a compass
03/04/1998EP0826137A1 Process for determining the direction of the earth's magnetic field
02/1998
02/26/1998WO1998007958A1 Method and apparatus for providing a magnetic direction reference
02/24/1998US5721713 Watch comprising an arrangement for indicating a predetermined geographic locality
02/18/1998CN2274759Y Direction indicating ornamental artical inside vehicle
02/18/1998CN2274758Y Direction indicator keeping horizontal status
01/1998
01/29/1998WO1998003899A1 Easy-to-use watch and azimuth magnet
01/29/1998DE19628671A1 Hinged compass with disc-shaped housing of non-magnetic metal
01/13/1998US5708410 Vehicle information display
01/02/1998DE19625078A1 Sensor component produced in microstructural circuitry in form of transverse girder
12/1997
12/29/1997EP0640207B1 Calibration method for a relative heading sensor
12/23/1997US5701259 Method for stabilizing the directional display of magnetic compasses
12/18/1997WO1997048037A1 Graphical user interfaces for computer vision systems
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