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Class Information
Number: 33/319
Name: Geometrical instruments > Indicator of direction of force traversing natural media > Gyroscopically controlled or stabilized > Magnetic compass
Description: Device wherein a directional indicator influenced by an external magnetic field is additionally controlled or stabilized by the gyroscope.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7248983 |
Electronic compass and method of controlling an electronic compass using independent calibration and compass heading modules |
Jul. 24, 2007 |
| 7197343 |
Portable electronic apparatus with azimuth measuring function, magnetic sensor suitable for the apparatus, and azimuth measuring method for the apparatus |
Mar. 27, 2007 |
| 6853918 |
Electronic compass |
Feb. 8, 2005 |
| 6243660 |
Digital compass with multiple sensing and reporting capability |
Jun. 5, 2001 |
| 5878370 |
Vehicle compass system with variable resolution |
Mar. 2, 1999 |
| 4767988 |
Precision magnetometer orientation device |
Aug. 30, 1988 |
| 4533872 |
Magnetic field sensor element capable of measuring magnetic field components in two directions |
Aug. 6, 1985 |
| 4531298 |
Apparatus and method for controlling northerly turning error in direction indicating navigational instruments |
Jul. 30, 1985 |
| 4032758 |
Compensated vehicle heading system |
Jun. 28, 1977 |
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