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Class Information
Number: 33/480
Name: Geometrical instruments > Straightedge type > Plural straightedges nonadjustably fixed at right angles (e.g., t-square, triangles, squares) > Try square
Description: Subject matter comprising two straightedges conjointly secured at a 90° angle for the purpose of ascertaining whether a piece of work is at a true 90° angle.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7337550 |
Combination square |
Mar. 4, 2008 |
| 6904689 |
Guide device |
Jun. 14, 2005 |
| 6785976 |
Right angle combination square |
Sep. 7, 2004 |
| 6758016 |
Adjustable support for steps |
Jul. 6, 2004 |
| 6553677 |
Combination square |
Apr. 29, 2003 |
| 6018880 |
Straight edge guide for cutting materials |
Feb. 1, 2000 |
| 5388339 |
Tri-square protractor |
Feb. 14, 1995 |
| 5170568 |
Roofing speed square and method of use |
Dec. 15, 1992 |
| 5140755 |
Layout square |
Aug. 25, 1992 |
| 5103570 |
Square relief device |
Apr. 14, 1992 |
| 5038487 |
Attachment for framer's square |
Aug. 13, 1991 |
| 4999922 |
Ruled multi-purpose drafting instrument |
Mar. 19, 1991 |
| 4944096 |
Wall stud centering square |
Jul. 31, 1990 |
| 4776250 |
Square for glass cutting |
Oct. 11, 1988 |
| 4700489 |
Square level measuring tool |
Oct. 20, 1987 |
| 4654978 |
Marking guide for use with metal studs |
Apr. 7, 1987 |
| 4503624 |
Combination square, scribing tool and plumb level |
Mar. 12, 1985 |
| 4227314 |
Carpenter square with tape holder |
Oct. 14, 1980 |
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