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Class Information
Number: 33/424
Name: Geometrical instruments > Straightedge type > Square and pivoted straightedge > With protractor
Description: Subject matter including a device having a circular pattern of indicia for indicating angles in degrees.










Sub-classes under this class:

Class Number Class Name Patents
33/425 And sliding straightedge 5
33/426 Located on straightedge 7


Patents under this class:

Patent Number Title Of Patent Date Issued
8191272 Protractor apparatus Jun. 5, 2012
7716843 Integrated x-ray measurement tool for equine conformation May. 18, 2010
7430810 Laser square protractor kit Oct. 7, 2008
7278217 Trigonometric teaching aid Oct. 9, 2007
7269909 Rafter layout tool Sep. 18, 2007
7188427 Multi-task protractor Mar. 13, 2007
7003891 Compact miter apparatus Feb. 28, 2006
6954990 Angle measuring device Oct. 18, 2005
6892467 Method and apparatus for edge locating and angle setting May. 17, 2005
6553676 Protractor Apr. 29, 2003
6330752 Adjustable squaring tool Dec. 18, 2001
6101733 Saw blade alignment tool Aug. 15, 2000
5983509 Marine navigation device Nov. 16, 1999
5809659 Angle guide instrument Sep. 22, 1998
5632096 Saw blade alignment tool May. 27, 1997
5539991 Adjustable sheathing square Jul. 30, 1996
5533270 Method and apparatus for measuring stairs Jul. 9, 1996
5461794 Movable type measurement scale at variable angles Oct. 31, 1995
5419053 Measuring tool May. 30, 1995
5388339 Tri-square protractor Feb. 14, 1995
5117560 Full circle protractor with detachable adjustable leg assembly for measuring angles Jun. 2, 1992
5113590 Protractor May. 19, 1992
5040298 Protractor with electronic measuring device and digital display Aug. 20, 1991
4835877 Try square protractor Jun. 6, 1989
4731933 Protractor-chalkline Mar. 22, 1988
4509268 Dental curet sharpening guide Apr. 9, 1985
4369583 Plotting device Jan. 25, 1983
4358898 Protractor Nov. 16, 1982
4221055 Drafting instrument Sep. 9, 1980
4208804 Ruler means for dividing a distance Jun. 24, 1980











 
 
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