Resources Contact Us Home
Browse by Category: Main > Business
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

  Recently Added Patents
Volume compensation within a photovoltaic device
Vanilloid receptor ligands and use thereof for the production of pharmaceutical preparations
Color stable manganese-doped phosphors
Image sensor pixels with junction gate photodiodes
System and method for testing an integrated circuit embedded in a system on a chip
DNA promoters and anthrax vaccines
Method and laser receiver for acoustically indicating a laser beam
  Randomly Featured Patents
Data processor
Deformable intraocular lens insertion system
Dual-band electromagnetic coupler
Preparation of olefins, particularly of propylene, by dehydrogenation
Memory management system and method for network controller
Tree structure based 2D to 3D registration
Volatile memory elements with elevated power supply levels for programmable logic device integrated circuits
Stand for musical instrument
Method for preparing an electrophotographic photoreceptor
Image position detection technique in which input parameters can be easily determined