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Class Information
Number: 33/285
Name: Geometrical instruments > Straight-line light ray type > Horizontal angle measurer
Description: Device for measuring an angle in the plane of or parallel to the horizon.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8407903 Rotating construction laser, in particular a self-compensating rotating construction laser, and method for measuring a tilt of an axis of rotation of a construction laser Apr. 2, 2013
7966739 Laser surveying system Jun. 28, 2011
7874077 Device for determining the inclination of a tool, such as an electric drill Jan. 25, 2011
7610687 Method and rotating laser for determining an item of attitude information of at least one object Nov. 3, 2009
7418786 Marking device Sep. 2, 2008
7099000 Laser leveling apparatus Aug. 29, 2006
7081824 Track monitoring equipment Jul. 25, 2006
7051445 Apparatus generating a light illuminated line May. 30, 2006
7031367 Laser level Apr. 18, 2006
6996910 Laser leveling device for generating parallel lines Feb. 14, 2006
6912792 Apparatus for determining a level surface Jul. 5, 2005
6873420 Topographical measurement machine for bowling lanes and the like Mar. 29, 2005
6782034 Laser plumbing and leveling instrument which adjusting height of horizontal line Aug. 24, 2004
6710319 System for radiating a reference laser beam and utilizing GPS units for installing an article Mar. 23, 2004
6694630 Multiple-axis laser emitter with optical beam splitter Feb. 24, 2004
6679609 Laser beam irradiation device Jan. 20, 2004
6625895 Servo-controlled automatic level and plumb tool Sep. 30, 2003
6618950 Projection apparatus for demarcation Sep. 16, 2003
6487781 Bore path alignment system Dec. 3, 2002
6449856 Laser plumbing device, long member plumbing device and long member plumbing method Sep. 17, 2002
6314651 Rotary laser irradiating system and photodetection system Nov. 13, 2001
6279239 Device and a method for sizing odd parts of drywall for placement on ceilings and walls Aug. 28, 2001
6253457 Laser beam direction correcting optical system for a surveying instrument Jul. 3, 2001
6212782 Building line layout device Apr. 10, 2001
6101728 Versatile VH laser plumb Aug. 15, 2000
6082013 Apparatus for leveling an object Jul. 4, 2000
6076266 Theodolite with a disengageable adjustment mechanism Jun. 20, 2000
5987763 Drive device for aligning a theodolite Nov. 23, 1999
5887353 Two-speed continuous tangent screw Mar. 30, 1999
5782003 Device for projecting a flat beam of diverging laser rays Jul. 21, 1998
5689892 Two-speed continuous tangent screw Nov. 25, 1997
5575073 Apparatus for setting a horizontal plane by means of a level Nov. 19, 1996
5572796 Laser beam pendular level Nov. 12, 1996
5519642 Electronic survey instrument May. 21, 1996
5488777 Utility line angle measurement device Feb. 6, 1996
5450909 Grade determining method and apparatus Sep. 19, 1995
5402226 Survey apparatus Mar. 28, 1995
5269070 Instrument for measuring flatness or uniformity of curvature Dec. 14, 1993
5189799 Laser goniometer Mar. 2, 1993
4976039 Navigation aid Dec. 11, 1990
4752126 Surveying instrument Jun. 21, 1988
4656878 Rotation axis fine adjustment apparatus Apr. 14, 1987
4644659 Transit Feb. 24, 1987
4407012 Multi-directional light source Sep. 27, 1983
4302885 North finder with optical transfer provision Dec. 1, 1981
4281463 Rotatable disc support arrangement for angle measuring apparatus Aug. 4, 1981
4219939 Method and device for surveying the basal area of a forest stand Sep. 2, 1980
4057906 Navigational instruments Nov. 15, 1977
4009602 Tube bending tool with angle sighting means Mar. 1, 1977
3936947 Rotating arm aiming device system Feb. 10, 1976

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