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Class Information
Number: 33/361
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Magnetic field responsive > Electro-magnet or inductor (e.g., flux valve, etc.)
Description: Device wherein the means influenced by the external magnetic field is either an electromagnet (e.g., electromagnetic compass needle) or an inductor (e.g., armature, flux valve, flux gate, etc.).
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7379814 |
Electronic compass system |
May. 27, 2008 |
| 7181857 |
Geomagnetic sensor for auto-calibration of magnetic field deviation and method of using the same |
Feb. 27, 2007 |
| 7168177 |
Method and apparatus for determining a geomagnetic field by using a compass and method and apparatus for determining an azimuth angle of a moving object using the same |
Jan. 30, 2007 |
| 7168176 |
Geomagnetic sensor for informing users whether detected azimuth angle is acceptable, and a method thereof |
Jan. 30, 2007 |
| 7134213 |
Magic compass |
Nov. 14, 2006 |
| 7127369 |
Sensor assembly |
Oct. 24, 2006 |
| 7053608 |
Magnetometer having a dynamically adjustable bias setting and electronic vehicle compass incorporating the same |
May. 30, 2006 |
| 6972563 |
Method of adjusting a fluxgate magnetometer apparatus |
Dec. 6, 2005 |
| 6831457 |
Two-dimensional magnetic sensor including magneto-impedance sensor elements |
Dec. 14, 2004 |
| 6771066 |
Printed circuit fluxgate sensor for magnetic gradient detection device |
Aug. 3, 2004 |
| 6760678 |
Electronic compass |
Jul. 6, 2004 |
| 6643941 |
Vehicle compass system with continuous automatic calibration |
Nov. 11, 2003 |
| 6566856 |
Closed-loop magnetoresistive current sensor system having active offset nulling |
May. 20, 2003 |
| 6523271 |
Method of adjusting drive current of magnetism sensor and electronic azimuth meter |
Feb. 25, 2003 |
| 6512370 |
Low power, frequency-mode magnetometer |
Jan. 28, 2003 |
| 6502014 |
Regulating circuit for regulating the driving stability of a motor vehicle using a motor vehicle reference model |
Dec. 31, 2002 |
| 6466871 |
Method for calibrating and verifying the attitude of a compass |
Oct. 15, 2002 |
| 6427349 |
Compensation system for electronic compass |
Aug. 6, 2002 |
| 6407547 |
Biaxial flux gate type magnetic sensor |
Jun. 18, 2002 |
| 6380735 |
Orthogonal flux-gate type magnetic sensor |
Apr. 30, 2002 |
| 6282803 |
Self calibration circuit for determining an accurate zero compensation for a fluxgate compass |
Sep. 4, 2001 |
| 6222363 |
Switch-mode flux-gate magnetometer |
Apr. 24, 2001 |
| 6218831 |
Low power fluxgate circuit with current balance |
Apr. 17, 2001 |
| 6181130 |
Magnetic sensor having excitation coil including thin-film linear conductor sections formed on bobbin with detection coil wound thereon |
Jan. 30, 2001 |
| 6173501 |
Compensation system for electronic compass |
Jan. 16, 2001 |
| 6141881 |
Electronic analogue compass |
Nov. 7, 2000 |
| 6084406 |
Half-cycle saturable-core magnetometer circuit |
Jul. 4, 2000 |
| 6070333 |
Electronic compass |
Jun. 6, 2000 |
| 6044315 |
Vehicle non-volatile memory system |
Mar. 28, 2000 |
| 6014025 |
PWM flux-gate circuit for measuring magnitude and direction of a magnetic field |
Jan. 11, 2000 |
| 5850624 |
Electronic compass |
Dec. 15, 1998 |
| 5802727 |
Compensation system for electronic compass |
Sep. 8, 1998 |
| 5757184 |
Magnetic field detection apparatus with bilateral electrical switch for inverting magnetic sensor current |
May. 26, 1998 |
| 5749150 |
Direction indicator for navigation |
May. 12, 1998 |
| 5672967 |
Compact tri-axial fluxgate magnetometer and housing with unitary orthogonal sensor substrate |
Sep. 30, 1997 |
| 5655308 |
Illuminating navigation device |
Aug. 12, 1997 |
| 5652512 |
Advanced digital flux gate magnetometer |
Jul. 29, 1997 |
| 5644851 |
Compensation system for electronic compass |
Jul. 8, 1997 |
| 5632092 |
Compensation system for electronic compass |
May. 27, 1997 |
| 5581899 |
Process for compensating a magnetic interference field in a vehicle |
Dec. 10, 1996 |
| 5564194 |
Geomagnetic direction sensor |
Oct. 15, 1996 |
| 5560115 |
Gimbaled magnetometer with inductive coupling |
Oct. 1, 1996 |
| 5481808 |
Vehicle orientation sensor and method with magnetic stabilization |
Jan. 9, 1996 |
| 5444916 |
Electronic stereo clino-compass |
Aug. 29, 1995 |
| 5435070 |
Simplified compass with multiple segment display capability |
Jul. 25, 1995 |
| 5418460 |
Compact triaxial AC magnetic field analyzer/dosimeter using swept bandpass filters |
May. 23, 1995 |
| 5394029 |
Geomagnetic orientation sensor, means, and system |
Feb. 28, 1995 |
| 5383280 |
Direction indicator for navigation |
Jan. 24, 1995 |
| 5353241 |
Shifting system and method for an electronic compass system |
Oct. 4, 1994 |
| 5339529 |
Magnetic sensor mount |
Aug. 23, 1994 |
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