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Class Information
Number: 33/478
Name: Geometrical instruments > Straightedge type > Plural straightedges nonadjustably fixed at right angles (e.g., t-square, triangles, squares) > Folding or separable
Description: Subject matter wherein the straightedges are adjustable from a storage position to a 90° angle or one of the straightedges can be removed from the device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7204031 |
Telescoping T-square |
Apr. 17, 2007 |
| 7191534 |
Handheld layout and marking tool |
Mar. 20, 2007 |
| 7007731 |
Base frame for fixture |
Mar. 7, 2006 |
| 6964111 |
Folding drywall square |
Nov. 15, 2005 |
| 6807743 |
Square level |
Oct. 26, 2004 |
| 6442856 |
Extendable tool for use marking angular lines |
Sep. 3, 2002 |
| 5832618 |
Combination level and T-square |
Nov. 10, 1998 |
| 5819427 |
Carpenter's pull-apart framing square |
Oct. 13, 1998 |
| 5771597 |
Device for connecting the arms of an angle |
Jun. 30, 1998 |
| 5598637 |
Auxiliary rule of tile cutter |
Feb. 4, 1997 |
| 5433011 |
Combination interlocking segmented level |
Jul. 18, 1995 |
| 5377418 |
T-square, and methods of construction and utilizing same |
Jan. 3, 1995 |
| 5367783 |
Layout template tool for positioning building materials |
Nov. 29, 1994 |
| 5353509 |
Multi-purpose T-square and level combination tool |
Oct. 11, 1994 |
| 5323541 |
Template for laying out a one-piece cover for a stair step |
Jun. 28, 1994 |
| 5245758 |
T-square attachment for carpenter's level |
Sep. 21, 1993 |
| 5141232 |
Golf swing training system and method |
Aug. 25, 1992 |
| 4987685 |
Foldable accounting guide |
Jan. 29, 1991 |
| 4910876 |
Level attachment |
Mar. 27, 1990 |
| 4674192 |
Accounting guide |
Jun. 23, 1987 |
| 4580352 |
Foldable template for laying out stairway stringers and methods of using the same |
Apr. 8, 1986 |
| 4423554 |
Insulation depth gauge |
Jan. 3, 1984 |
| 4361964 |
Lay out square |
Dec. 7, 1982 |
| 4357755 |
Column pad layout device, anchor bolt layout device, and layout methods |
Nov. 9, 1982 |
| 4327501 |
Square adapter for level |
May. 4, 1982 |
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