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Class Information
Number: 33/454
Name: Geometrical instruments > Straightedge type > Plural straightedges, relatively moveable > Parallel type
Description: Subject matter comprising at least two straightedges linked together so as to permit one of the straightedges to assume positions of varying distances from the other while maintaining parallelism with the stationary straightedge.

Patents under this class:

Patent Number Title Of Patent Date Issued
8326411 Trunk width measuring unit and visceral fat measuring device Dec. 4, 2012
8021158 Measurement instruction apparatus Sep. 20, 2011
7877889 Anchor bolt positioning system Feb. 1, 2011
7546688 Parallel ruler device Jun. 16, 2009
7469485 Apparatus for replicating quadrilateral shapes Dec. 30, 2008
7159328 Measurement gauge incorporating a level Jan. 9, 2007
6986210 Adjustable cutting template Jan. 17, 2006
6804894 Parallel rule Oct. 19, 2004
6321459 Device for assisting a user to draw a topographical contour map Nov. 27, 2001
6195903 Tools for squaring ends of elongated objects Mar. 6, 2001
6173503 Adjustable gauge device for use in installing railing spindles Jan. 16, 2001
6119356 Parallelogram tool for locating stairway and stair landing railings Sep. 19, 2000
5437105 Center finding device Aug. 1, 1995
5410816 Tile, angle-cutting gauge May. 2, 1995
5361508 Tile, angle-cutting gauge Nov. 8, 1994
5241754 Navigational aid for use with a map, chart, or the like Sep. 7, 1993
5152069 Parallel rule Oct. 6, 1992
5107600 Parallel measuring guide device Apr. 28, 1992
4601108 Spacer device Jul. 22, 1986
4351117 Drawing board apparatus Sep. 28, 1982
4164249 Method and apparatus for machining components for stairs Aug. 14, 1979
4078312 Drafting parallel bar Mar. 14, 1978

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