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)
02/1983
02/15/1983US4373271 Solid state compass
02/08/1983US4372052 Device for indicating direction to a predetermined locale
12/1982
12/22/1982EP0067338A2 Method for the correction of a magnetic field probe
12/22/1982EP0067337A1 Arrangement of a magnetic field probe on a vehicle
12/15/1982EP0066595A1 Optoelectrical magnetic compass
11/1982
11/23/1982US4359823 Gravity adjusted compass
11/16/1982US4358985 Magnetic heading reference system and gun position system for military vehicles
11/09/1982US4357756 Magnetic compass
09/1982
09/22/1982EP0060814A1 Apparatus for indicating the direction of Mecca
09/16/1982WO1982003132A1 Portable information device
09/07/1982US4347730 Method and apparatus for calibrating gyroscopically-stabilized, magnetically-slaved heading reference system
07/1982
07/27/1982US4341023 Digital compass
07/22/1982WO1982002429A1 Orienteering compass
07/13/1982US4338810 Calibrator for a magnetic azimuth detector
07/06/1982CA1127304A1 Apparatus for determining positional coordinates utilizing the terrestrial magnetism as a directional reference
06/1982
06/24/1982WO1982002088A1 Optoelectrical magnetic compass
06/22/1982US4335521 Method and apparatus for geographic location
06/01/1982US4333154 Device for determining the direction of a line of sight
05/1982
05/19/1982EP0052063A1 Watch with a compass, and its manufacturing method
05/19/1982EP0052022A1 Calibrator for a service magnetic azimuth detector of an aircraft and method employing a test detector
05/04/1982US4327498 Magnetic compass compensation system
04/1982
04/20/1982US4325246 Compass checker
03/1982
03/31/1982EP0048296A1 Device indicating for a predetermined location the direction of a great circle passing through Mecca
03/23/1982CA1120256A1 Terrestrial magnetism responsive device
02/1982
02/16/1982CA1118198A1 Ballast type remote indicating floating magnetic compass
01/1982
01/12/1982US4309828 Attachment for a magnetic needle assembly for vehicles
12/1981
12/16/1981EP0041892A1 Methods and devices for compensating magnetic disturbances during the measurement of a magnetic track
12/08/1981US4305035 Magnetic field amplitude detection sensor apparatus
12/01/1981US4303172 Compass hood
11/1981
11/17/1981US4300390 Apparatus for determining positional coordinates utilizing the terrestrial magnetism as a directional reference
09/1981
09/15/1981US4288927 Terrestrial magnetism responsive method and device including a soft iron bar on a free end of a magnet
09/08/1981CA1108442A1 Gyroscopic method and apparatus for determining magnetic heading and attitude
08/1981
08/25/1981US4285158 Toy for detecting magnetic fields with electrical compass contacts
05/1981
05/19/1981US4267640 System for ascertaining magnetic field direction
05/12/1981US4267509 Magneto-optical colloidal cell and device
04/1981
04/21/1981US4262427 Flux valve compass system
03/1981
03/17/1981US4255866 Nonmagnetic compass
03/03/1981CA1096662A1 Semi-automatic self-contained magnetic azimuth detector calibration apparatus and method
02/1981
02/17/1981US4250627 Compass apparatus
02/17/1981US4250626 Electronic compass
02/04/1981EP0023227A1 Actual position detecting device for a moving object
12/1980
12/30/1980US4241511 Method and apparatus for determining and recording boat compass deviation
12/02/1980US4236316 Vessel adaptable to the expansion and/or contraction of fluid therein
11/1980
11/11/1980US4232451 Detector for sensing the angular position of a rotatable magnet
10/1980
10/14/1980US4227313 Compasses
10/01/1980EP0016684A1 Device for determining a line of sight
08/1980
08/19/1980US4217699 Terrestrial magnetism responsive device and method for using north or south seeking magnets in both north and south headings
08/12/1980CA1083339A1 Photoelectrically sensed magnetic compass
08/07/1980WO1980001606A1 Actual position detecting device for a moving object
06/1980
06/10/1980US4207463 Rotation angle sensor
04/1980
04/15/1980US4197655 Gyroscopic method and apparatus for determining magnetic heading and attitude
03/1980
03/19/1980EP0008861A2 Digital bearing repeater
03/04/1980US4190962 Navigation devices
01/1980
01/22/1980US4184267 Compass having a course directing pointer
01/22/1980CA1070107A2 Flux valve heading repeater compensation systems
12/1979
12/18/1979US4179741 Magnetic compasses
11/1979
11/27/1979US4175333 Magnetic compass
11/06/1979CA1065599A2 Flux valve heading repeater compensation systems
10/1979
10/31/1979EP0004996A1 Rectangular prayer rug
10/30/1979CA1065454A1 Spatial orientation device
08/1979
08/07/1979US4163326 Remote indicating solid state compass
08/07/1979US4163324 Surveying of boreholes
07/1979
07/31/1979CA1059311A1 Flux valve heading repeater compensation systems
06/1979
06/19/1979US4158260 Wrist compass and transit
06/19/1979CA1056594A1 Electromagnetic compass
06/12/1979US4157619 Inclination and direction responsive apparatus
05/1979
05/17/1979WO1979000259A1 Gyroscopic method and apparatus for determining magnetic heading and attitude
04/1979
04/03/1979US4146970 Remote-indicating magnetic compass
04/03/1979CA1051654A1 Single pivot remote reading compass
03/1979
03/13/1979US4143467 Semi-automatic self-contained magnetic azimuth detector calibration apparatus and method
02/1979
02/27/1979US4141152 Piloting instrument
02/20/1979US4139951 Remote indicating compass
02/20/1979US4139950 Direction responsive flux gate unit
02/20/1979US4139949 Compass having a fiber optic output
01/1979
01/23/1979CA1046756A1 Magnetic heading reference for a vehicle
01/02/1979US4132113 Navigation devices
12/1978
12/12/1978CA1044008A1 Remote indicating compass
11/1978
11/14/1978CA1042199A1 Magnetic compass for sailing
11/07/1978US4124897 Compensation system for a magnetic compass
10/1978
10/03/1978US4117602 Electromagnetic compass
09/1978
09/26/1978US4116057 Pendulous induction compass transmitter with means to compensate for heading errors in turns due to the vertical component of the Earth's magnetic field and due to two cycle error
09/19/1978US4114436 "Strapdown" induction compass transmitter with compensation for heading errors due to the vertical component of the Earth's magnetic field and due to two cycle error during turns and during climbing and diving maneuvers
09/12/1978US4112755 "Strapdown" induction compass transmitter with means to compensate for heading errors during turns and during dives and climbs due to the vertical component of the Earth's magnetic field and due to two cycle error
09/12/1978US4112754 Pendulous induction compass transmitter including means external to the transmitter to compensate for heading errors in turns due to the vertical component of the earth's magnetic field and due to two cycle error
09/05/1978US4110914 Hand compasses
08/1978
08/29/1978US4109389 Shaft angle transducer
08/08/1978US4104803 Direction finding device and guidance system
06/1978
06/20/1978US4095348 Digital compass
05/1978
05/30/1978US4091543 Automatic magnetic compass correction
05/16/1978US4089118 Course indicator
04/1978
04/04/1978US4081912 Magnetic bearing plotting and sighting device
03/1978
03/07/1978US4077131 Magnetic compass arrangements
02/1978
02/21/1978US4075619 Remote reading compass display
11/1977
11/01/1977US4055902 Compass with means for correcting angle of magnetic variation
09/1977
09/06/1977US4047168 Digital compass and gimbal assembly for two conductor connection
07/1977
07/26/1977US4037328 Spatial orientation device
06/1977
06/28/1977US4031630 Calibration apparatus for automatic magnetic compass correction
06/21/1977US4030204 Remote indicating solid state magnetic sensor
06/07/1977US4027398 Single pivot remote reading compass
05/1977
05/17/1977US4023277 Combined measuring tape and compass
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