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Class Information
Number: 33/490
Name: Geometrical instruments > Straightedge type > Rules > With attachment > Located on end
Description: Subject matter wherein a device is positioned at the extremities of the straightedge for the purpose of facilitating the drawing of a straight line.










Patents under this class:

Patent Number Title Of Patent Date Issued
8359759 Scale coupling system Jan. 29, 2013
6964112 Measuring instrument Nov. 15, 2005
6314653 Ruler device Nov. 13, 2001
5739785 Location and generation of high accuracy survey control marks using satellites Apr. 14, 1998
5379754 Method using approximating apparatus for hernia repair Jan. 10, 1995
4744151 Surveying equipment May. 17, 1988
4452349 Clutch wear measurement device Jun. 5, 1984











 
 
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