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Class Information
Number: 33/434
Name: Geometrical instruments > Straightedge type > Base attached > Perspective drawing > With parallel straightedge arrangement (i.e., drafting machine)
Description: Subject matter comprising a straightedge device which may be moved over the supporting base or surface with the ruling edge of the straightedge at all times in line with a vanishing point as relates to drawing perspectives.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7204028 |
Perspective view drafting device |
Apr. 17, 2007 |
| 7076881 |
Device for measuring and teaching scales of units |
Jul. 18, 2006 |
| 6718737 |
Method of and apparatus for automatically packaging encased product |
Apr. 13, 2004 |
| 6360448 |
System for laying out an installation of components and method of use |
Mar. 26, 2002 |
| 5632094 |
Articulated drafting device for drawing perspectives |
May. 27, 1997 |
| 5077904 |
Drafting apparatus |
Jan. 7, 1992 |
| 4899454 |
Perspective drawing machine |
Feb. 13, 1990 |
| 4565016 |
Perspective drafting instrument |
Jan. 21, 1986 |
| 4492031 |
Vernier device of the digital display type for a universal parallel ruler |
Jan. 8, 1985 |
| 4430797 |
Plotting device |
Feb. 14, 1984 |
| 4419823 |
Programmable braking device |
Dec. 13, 1983 |
| 4367589 |
Drafting machine head |
Jan. 11, 1983 |
| 4357757 |
Perspective drawing machine |
Nov. 9, 1982 |
| 4254555 |
Perspective view apparatus |
Mar. 10, 1981 |
| 4233751 |
Universal parallel ruler for three-dimensional drawing |
Nov. 18, 1980 |
| 4206551 |
Universal parallel ruler for three-dimensional drawing |
Jun. 10, 1980 |
| 4117599 |
Apparatus for drafting inaccurate conic perspective |
Oct. 3, 1978 |
| 4075762 |
Instrument for making perspective drawing |
Feb. 28, 1978 |
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