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Class Information
Number: 33/432
Name: Geometrical instruments > Straightedge type > Base attached > Perspective drawing
Description: Subject matter comprising a device specially designed to help depict from a plan or elevation a view as it would appear to the eye.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7373734 |
Linear proportioner |
May. 20, 2008 |
| 7204028 |
Perspective view drafting device |
Apr. 17, 2007 |
| 6751878 |
APPARATUS AND METHOD FOR CREATING A DRAWING OF A THREE-DIMENSIONAL OBJECT MANUALLY AND /OR ELECTRONICALLY BY VIEWING THE OBJECT THROUGH A TRANSPARENT WINDOW PANE AND TRACING THE OBJECT ON THE |
Jun. 22, 2004 |
| 6487784 |
Portable drawing board for art students |
Dec. 3, 2002 |
| 5799402 |
Portable device for removably positioning and resetting vanishing points of perspective drawings |
Sep. 1, 1998 |
| 5718053 |
Stationary perspective device |
Feb. 17, 1998 |
| 5673492 |
Perspective drawing alignment apparatus |
Oct. 7, 1997 |
| 5632094 |
Articulated drafting device for drawing perspectives |
May. 27, 1997 |
| 5077904 |
Drafting apparatus |
Jan. 7, 1992 |
| RE33654 |
Drafting device |
Aug. 6, 1991 |
| 4918822 |
Perspective drafting apparatus |
Apr. 24, 1990 |
| 4899454 |
Perspective drawing machine |
Feb. 13, 1990 |
| 4823475 |
Drafting device |
Apr. 25, 1989 |
| 4586265 |
Perspective drawing apparatus |
May. 6, 1986 |
| 4565016 |
Perspective drafting instrument |
Jan. 21, 1986 |
| 4505041 |
Perspective drawing templates |
Mar. 19, 1985 |
| 4453318 |
Apparatus for producing perspective drawings |
Jun. 12, 1984 |
| 4403423 |
Drafting instrument |
Sep. 13, 1983 |
| 4360975 |
Perspective drawing machine |
Nov. 30, 1982 |
| 4166322 |
Rulers for making axonometric projection drawings |
Sep. 4, 1979 |
| 4166321 |
Orthographic to axonometric plotting apparatus |
Sep. 4, 1979 |
| 4159571 |
Geometrical instrument |
Jul. 3, 1979 |
| 4137635 |
Standard parallel rule with perspective drawing device |
Feb. 6, 1979 |
| 4007542 |
Straightedge |
Feb. 15, 1977 |
| 3945123 |
Device for drawing objects in perspective |
Mar. 23, 1976 |
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