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Class Information
Number: 33/30.1
Name: Geometrical instruments > Scriber > Curved line > Ellipsograph
Description: Subject matter wherein the curve has a major and a minor axis with two foci on the major axis so that the sum of the distances from each focus to a point on the curve is equal to the length of the major axis.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7174645 |
Method for designing of aproximate elliptical structure and the same |
Feb. 13, 2007 |
| 7010860 |
Hand-held cutting device |
Mar. 14, 2006 |
| 6904697 |
System for marking an arc segment |
Jun. 14, 2005 |
| 6823764 |
Apparatus for boring stoma wafers |
Nov. 30, 2004 |
| 6668461 |
Hand-held cutting device |
Dec. 30, 2003 |
| 6484406 |
Hand-held cutting devices |
Nov. 26, 2002 |
| 6374503 |
Oval cutter |
Apr. 23, 2002 |
| 6308426 |
Ellipsograph |
Oct. 30, 2001 |
| 6276067 |
Ellipse drawing/cutting device |
Aug. 21, 2001 |
| 6158133 |
Oval cutter |
Dec. 12, 2000 |
| 5870830 |
Conic section compass |
Feb. 16, 1999 |
| 5546664 |
Compass able to draw any-size ellipses |
Aug. 20, 1996 |
| 5493780 |
Tool for carpentry calipers for curved frames with joined end corners |
Feb. 27, 1996 |
| 5189800 |
Device for drawing elliptical curves |
Mar. 2, 1993 |
| 5123171 |
Irregular surface ellipsograph |
Jun. 23, 1992 |
| 5123170 |
Ellipsograph as a drafting tool |
Jun. 23, 1992 |
| 5056230 |
Ellipsograph structure |
Oct. 15, 1991 |
| 4688331 |
Ellipsograph |
Aug. 25, 1987 |
| 4624057 |
Method and template for circle layouts |
Nov. 25, 1986 |
| 4571837 |
Ellipsograph |
Feb. 25, 1986 |
| 4570344 |
Ellipsograph |
Feb. 18, 1986 |
| 4445275 |
Drawing assembly |
May. 1, 1984 |
| 4182043 |
Drawing instrument for an ellipse |
Jan. 8, 1980 |
| 4150487 |
Instrument for tracing curved figures particularly ellipses |
Apr. 24, 1979 |
| 4048724 |
Ellipsograph |
Sep. 20, 1977 |
| 4045875 |
Ellipsograph drafting apparatus |
Sep. 6, 1977 |
| 4014101 |
Ellipse drawing instrument |
Mar. 29, 1977 |
| 4010546 |
Ellipse drawing instrument |
Mar. 8, 1977 |
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