| Patents for G01C 1 - Measuring angles (3,035) |
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| 08/16/1988 | US4763418 Automatic sextant |
| 07/19/1988 | US4758840 Means for calibrating the elevation and azimuth angles of the scan axis of an antenna |
| 07/06/1988 | CN87213670U Folding apparent instrument |
| 06/21/1988 | US4752126 Surveying instrument |
| 05/11/1988 | CN87211050U Construction site measurement instrument |
| 04/26/1988 | US4740681 Star sensor for attitude detection of a spinning satellite |
| 03/22/1988 | US4732472 Methods of, and systems for, determining the position of an object |
| 03/02/1988 | CN87205617U Automatic adjusting fast level unit for transit |
| 12/16/1987 | EP0248842A1 Optical angle of arrival measuring system |
| 12/12/1987 | CN86210456U Theodolite rule |
| 12/03/1987 | WO1987007366A1 Angle measuring instruments |
| 11/24/1987 | US4707926 For indicating the angular separation between two objects |
| 11/12/1987 | DE3615702A1 Navigational mirror-type angle measuring instrument |
| 11/04/1987 | EP0243385A1 Process and apparatus for transferring optically an angle between devices located at different points |
| 10/28/1987 | CN86108510A Arbitrary divider of an angle |
| 10/27/1987 | US4703167 Star scanner with semiconductor photosensitive elements having reticles |
| 10/27/1987 | US4702011 Sextant having a microprocessor for calculating the position of heavenly bodies |
| 10/27/1987 | US4702008 Zero setting device in surveying instrument |
| 10/07/1987 | EP0239576A1 Navigation systems |
| 09/16/1987 | EP0237433A1 System for the calibration of the elevation and azimuth angle of the radioelectric axis of an antenna |
| 07/21/1987 | US4682218 Surveying instrument with image display unit |
| 06/23/1987 | US4674873 Satellite locator apparatus |
| 06/23/1987 | US4674715 Measuring arrangement for determining the attitude of an earth satellite |
| 06/18/1987 | WO1987003696A1 Optical angle of arrival measuring system |
| 06/16/1987 | CA1223070A1 Star sensor using ccd |
| 06/04/1987 | DE3633319A1 Device for reading graduated circles |
| 05/12/1987 | US4664519 Angle encoder for encoding the zenithal angle between a variable determined direction and the vertical, in particular for a theodolite |
| 04/23/1987 | WO1987002450A1 Process and apparatus for transferring optically an angle between devices located at different points |
| 04/14/1987 | US4658431 Star sensor using CCD |
| 04/01/1987 | EP0216571A2 Star scanner |
| 03/12/1987 | DE3604502C1 Device for determining a site suitable for a parabolic reflector antenna |
| 02/24/1987 | US4644659 Transit |
| 01/13/1987 | US4635371 Device to indicate solar exposure |
| 01/13/1987 | CA1216452A1 Device for sensing moving light source |
| 12/02/1986 | US4626682 Angle measuring device |
| 10/28/1986 | US4620092 Elevation angle measuring device with apparatus for disabling the device when its inclination angle is offset from a predetermined inclination angle |
| 10/21/1986 | US4618259 Star and sun sensor for attitude and position control |
| 08/12/1986 | US4605304 Angle-measuring instrument with a coarse-fine drive arrangement |
| 07/31/1986 | WO1986004408A1 Navigation systems |
| 06/17/1986 | US4595294 Position detecting device |
| 03/18/1986 | US4576478 Optical instrument for measuring angles |
| 09/11/1985 | EP0154568A1 Angular encoder for encoding the zenith angle between a given variable direction and the vertical, especially in theodolites |
| 05/21/1985 | US4518859 Angle measuring device with line sensor |
| 03/27/1985 | EP0135065A1 Star sensor using CCD |
| 11/27/1984 | US4484565 Device for sensing moving light source |
| 08/21/1984 | US4466189 Angle measuring device |
| 07/31/1984 | US4462684 Single wheel celestial navigator |
| 07/10/1984 | US4458868 Arrangement for the stress-free mounting of shaft for the elevational movement of an optical device |
| 06/26/1984 | US4455758 Bearing means for angle measuring instruments |
| 05/30/1984 | EP0109926A2 Measuring system for an angle measuring instrument with an altitude circle and with digital indication |
| 05/22/1984 | US4449817 Celestial navigator |
| 05/01/1984 | US4445777 Optical system of a theodolite |
| 04/10/1984 | US4441812 Method and apparatus for automatic alignment of an angle-measuring instrument |
| 03/13/1984 | US4436421 For an equatorial mounting telescope |
| 02/22/1984 | EP0101055A1 Device for sensing moving light source |
| 02/15/1984 | EP0100683A2 Apparatus for taking azimuth sights |
| 01/31/1984 | US4428671 Optical device for vertically positioning a sextant |
| 12/20/1983 | US4421407 Image combining sextant or the like |
| 11/08/1983 | US4413906 Passive optical rangefinder/sextant having search capability |
| 06/29/1983 | EP0082556A1 Sextant |
| 05/17/1983 | US4383372 Instant position finder and course plotter |
| 04/19/1983 | CA1144789A1 Arrangement for the stress-free mounting of a shaft for the elevational movement of an optical device |
| 01/04/1983 | CA1138694A1 Flight trajectory and observation theodolite |
| 12/21/1982 | US4364183 Heliostat-adjusting solar sight |
| 11/02/1982 | US4357107 Flight trajectory and observation theodolite |
| 10/26/1982 | US4355902 Arrangement for determining the errors the vertical axis of a surveying device |
| 09/21/1982 | CA1131901A1 Portable ship's pelorus |
| 08/11/1982 | EP0057446A1 Surveying instrument having measuring mode selecting switch means |
| 08/10/1982 | US4343857 Coatings for optical systems |
| 07/13/1982 | US4339198 Geodetic instrument |
| 02/23/1982 | CA1118868A1 Theodolite for tracking and measuring a flying object with a tv camera arranged at a telescope |
| 12/01/1981 | US4302885 North finder with optical transfer provision |
| 11/24/1981 | CA1112860A1 Theodolite leveling means |
| 10/06/1981 | CA1110059A1 Device for optic, preferably visual determination of a certain plane |
| 09/16/1981 | EP0035559A1 Image combining sextant or the like |
| 09/08/1981 | CA1108427A1 Heat sensing means, particularly for solar water heating apparatus |
| 09/01/1981 | US4287411 Apparatus for seeking and following a luminous zone, such as the sun |
| 08/19/1981 | EP0033768A1 Theodolite for trajectory measurement and observation |
| 08/12/1981 | EP0033369A1 Tension-free suspension assembly for a spindle used in the elevatory movement of an optical appliance |
| 08/04/1981 | US4281463 Rotatable disc support arrangement for angle measuring apparatus |
| 07/21/1981 | US4280057 A surveying instrument having means for transmitting signals between an alidade and a fixed member |
| 07/07/1981 | US4277171 Base board device for measuring instruments |
| 06/09/1981 | CA1102595A1 Reflective lens system |
| 04/28/1981 | US4263892 Heat sensing means, particularly for solar water heating apparatus |
| 04/15/1981 | EP0027100A1 Method of determining vertical axis errors in a surveying instrument |
| 03/24/1981 | US4257164 Optical protractor |
| 03/19/1981 | WO1981000761A1 Image combining sextant or the like |
| 03/10/1981 | US4255765 Theodolite for tracking and measuring a flying object with a TV camera arranged at a telescope |
| 01/20/1981 | US4245393 Instant position finder and course plotter |
| 01/13/1981 | US4244547 Theodolite leveling means |
| 01/07/1981 | EP0020393A1 Theodolite |
| 12/30/1980 | CA1092343A1 Solar tracking device |
| 12/02/1980 | US4236313 Apparatus for and method of evaluating solar exposure |
| 09/02/1980 | CA1084739A1 Predetermined direction approach system |
| 07/15/1980 | CA1081514A1 Mount for continuously orienting a collector dish in a system adapted to perform both diurnal and seasonal solar tracking |
| 05/27/1980 | US4205385 Electronic surveying system |
| 05/13/1980 | US4202110 Theodolite tangent screw system |
| 04/29/1980 | CA1076345A1 Theodolite adjusting means |
| 04/22/1980 | US4198759 Optical plummet azimuth reference assembly |
| 04/15/1980 | US4197653 Electronic sextant |