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Class Information
Number: 33/18.3
Name: Geometrical instruments > Scriber > Perspective drawing
Description: Subject matter wherein the means for describing a line generates an oblique three-dimensional drawing from plan and elevational drafting views.

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7401410	Viewfinder for artists	Jul. 22, 2008
7373734	Linear proportioner	May. 20, 2008
6785972	Method and system for recording a viewing point	Sep. 7, 2004
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
6357130	Drafting template for preparing axonometric drawings	Mar. 19, 2002
4672749	Mechanical perspective drafting device	Jun. 16, 1987
4606127	Large pattern transposing	Aug. 19, 1986
4493152	Lettering machine	Jan. 15, 1985
4432140	Device for copying panoramic images	Feb. 21, 1984