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Class Information
Number: 434/216
Name: Education and demonstration > Mathematics > Geometry, trigonometry, or physical mathematic model structure > Demonstration means using filament (e.g., string, etc.) to define geometric shape
Description: Subject matter demonstrated by means including a strand such as string or wire which delineates a geometric form.

Patents under this class:

Patent Number Title Of Patent Date Issued
6702582 Device and method for solving circles Mar. 9, 2004
6213779 Conic section activity boards Apr. 10, 2001
6132217 Method and apparatus for teaching relationship of trigonometric functions between unit circle and rectangular coordinate system Oct. 17, 2000
6065968 Toy for forming variable three-dimensional design May. 23, 2000
6024574 Visual aids for understanding characteristics of geometric figures Feb. 15, 2000
5639090 Geoboard with movable pins Jun. 17, 1997
5328374 Geometry board Jul. 12, 1994
5215467 Mathematical instruction board and method of use Jun. 1, 1993
4371344 Tension model device Feb. 1, 1983

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