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Class Information
Number: 33/437
Name: Geometrical instruments > Straightedge type > Base attached > With guide or catch for t-square type
Description: Subject matter comprising means for maintaining the straightedge in positive rectilinear path relative to the base as it is moved along the edge of the supporting base.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6487784 |
Portable drawing board for art students |
Dec. 3, 2002 |
| 6289594 |
Drywall marking and scoring guide |
Sep. 18, 2001 |
| 6182549 |
Apparatus for securing flat articles for cutting |
Feb. 6, 2001 |
| 5845409 |
Drawing board |
Dec. 8, 1998 |
| 4819338 |
Drawing instruments |
Apr. 11, 1989 |
| 4577415 |
Windowed indexed calibrated T-square and precision-lined drafting board having linear edges |
Mar. 25, 1986 |
| 4506451 |
Multi-functional square and angle marking tool having extendable stops |
Mar. 26, 1985 |
| 4499667 |
Guide clamp |
Feb. 19, 1985 |
| 4481719 |
Drafting apparatus |
Nov. 13, 1984 |
| 4455773 |
Non-magnetic line guide unit for copy holder |
Jun. 26, 1984 |
| 4449304 |
Drawing instrument and locking apparatus therefor |
May. 22, 1984 |
| 4383375 |
Drafting apparatus |
May. 17, 1983 |
| 4379419 |
Panel grooving apparatus |
Apr. 12, 1983 |
| 4267656 |
Copy holder |
May. 19, 1981 |
| 4254556 |
Portable drafting device for drawing parallel lines, comprising a working plane of flexible plastic material, adapted to be rolled |
Mar. 10, 1981 |
| 4244119 |
Protractable straight-edge with vise |
Jan. 13, 1981 |
| 4159869 |
Cursor for use in microfilm reader |
Jul. 3, 1979 |
| 4102050 |
Cursor assembly |
Jul. 25, 1978 |
| 4030200 |
Portable sewing aligning table system |
Jun. 21, 1977 |
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