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Class Information
Number: 33/449
Name: Geometrical instruments > Straightedge type > With means for moving straightedge over a surface > By rollers
Description: Subject matter wherein the means for moving the straightedge includes rotatable cylindrical supports.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6247240 |
Ruler system |
Jun. 19, 2001 |
| 6122834 |
Combination framing and speed square |
Sep. 26, 2000 |
| 5647135 |
Drafting instrument with electronically controllable scale |
Jul. 15, 1997 |
| 5628118 |
Mini-drafting machine |
May. 13, 1997 |
| 5479719 |
Rolling ruler |
Jan. 2, 1996 |
| 5433012 |
Rolling rule |
Jul. 18, 1995 |
| 5193284 |
Multi-purpose drawing ruler |
Mar. 16, 1993 |
| 5174036 |
Multi-functional ruler |
Dec. 29, 1992 |
| 5172482 |
Drawing instrument |
Dec. 22, 1992 |
| 5152069 |
Parallel rule |
Oct. 6, 1992 |
| 5131157 |
Drafting device |
Jul. 21, 1992 |
| 5050309 |
Rolling ruler having a retractable and rotatable pivot pin |
Sep. 24, 1991 |
| RE33654 |
Drafting device |
Aug. 6, 1991 |
| 4944095 |
Guiding device for a computer mouse |
Jul. 31, 1990 |
| 4934061 |
Draughting tables, drawing boards, drawing instruments and analogous apparatus |
Jun. 19, 1990 |
| 4914824 |
Parallel rule |
Apr. 10, 1990 |
| 4823475 |
Drafting device |
Apr. 25, 1989 |
| 4732276 |
Hinged-lid package |
Mar. 22, 1988 |
| 4688334 |
Apparatus for making perspective drawings |
Aug. 25, 1987 |
| 4670991 |
Drawing machine |
Jun. 9, 1987 |
| 4586265 |
Perspective drawing apparatus |
May. 6, 1986 |
| 4577415 |
Windowed indexed calibrated T-square and precision-lined drafting board having linear edges |
Mar. 25, 1986 |
| 4383375 |
Drafting apparatus |
May. 17, 1983 |
| 4283861 |
Plotting device |
Aug. 18, 1981 |
| 4069588 |
Digitizer |
Jan. 24, 1978 |
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