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Class Information
Number: 33/31
Name: Geometrical instruments > Scriber > Curved line > Ellipsograph > Right-angle guides
Description: Devices comprising two guides at right angles to each other and a scribing member having means to engage the guides.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6668461 |
Hand-held cutting device |
Dec. 30, 2003 |
| 6484406 |
Hand-held cutting devices |
Nov. 26, 2002 |
| 6158133 |
Oval cutter |
Dec. 12, 2000 |
| 6052909 |
Hand-held oval cutting device |
Apr. 25, 2000 |
| 5555631 |
Ellipse Scribe |
Sep. 17, 1996 |
| 5526573 |
Device for circumscribing circles and ellipses |
Jun. 18, 1996 |
| 5430946 |
Device for circumscribing circles and ellipses |
Jul. 11, 1995 |
| 5189800 |
Device for drawing elliptical curves |
Mar. 2, 1993 |
| 5099727 |
Mechanism and method for circumscribing oval shapes |
Mar. 31, 1992 |
| 5058282 |
Ellipsograph |
Oct. 22, 1991 |
| 4567927 |
Apparatus for automatically forming ovals |
Feb. 4, 1986 |
| 4447954 |
Ellipsograph |
May. 15, 1984 |
| 4356633 |
Ellipsograph |
Nov. 2, 1982 |
| 4306598 |
Ellipse cutting machine |
Dec. 22, 1981 |
| 4244106 |
Device for describing an ellipse |
Jan. 13, 1981 |
| 4182043 |
Drawing instrument for an ellipse |
Jan. 8, 1980 |
| 4174572 |
Drafting instrument |
Nov. 20, 1979 |
| 4166320 |
Apparatus for tracing ellipses |
Sep. 4, 1979 |
| 4148144 |
Oval compass |
Apr. 10, 1979 |
| 4112793 |
Device for cutting ovals in mats or glass sheets |
Sep. 12, 1978 |
| 4048724 |
Ellipsograph |
Sep. 20, 1977 |
| 4014101 |
Ellipse drawing instrument |
Mar. 29, 1977 |
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