Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Business
Class Information
Number: 434/215
Name: Education and demonstration > Mathematics > Geometry, trigonometry, or physical mathematic model structure > Demonstration means using relatively turnable elements
Description: Subject matter demonstrated by a means including elements that turn relative to each other.










Patents under this class:

Patent Number Title Of Patent Date Issued
8437688 Test and answer key generation system and method May. 7, 2013
7748129 Apparatus and method for measuring the trigonometric cosine and trigonometric sine of an angle Jul. 6, 2010
6872078 Teaching cylinder instrument Mar. 29, 2005
6582234 Method for demonstrating the inverse square law and apparatus therefor Jun. 24, 2003
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
5775015 Location recorder process and assembly Jul. 7, 1998
5281145 Pictorial image transforming manipulatives Jan. 25, 1994
5205747 Bead calculator educational toy Apr. 27, 1993
5114347 Mathematical function demonstrator boards May. 19, 1992
4920033 Rotatable disk teaching apparatus Apr. 24, 1990
4705478 Superimposed transparencies used in education Nov. 10, 1987
4676754 Visual aid for teaching linear relationships Jun. 30, 1987
4461480 Educational entertainment device comprising cubes formed of four 1/8th octahedron sections rotatably coupled to a tetrahedron Jul. 24, 1984
4435162 Trigonometry visualizers and method of making same Mar. 6, 1984











 
 
  Recently Added Patents
Polar nematic compounds
Treatment devices with deliver-activated inflatable members, and associated systems and methods for treating the spinal cord and other tissues
Point-of-sale server and method
Delivery of captions, content advisory and other data through digital interface
Structural plasticity in spiking neural networks with symmetric dual of an electronic neuron
Audit planning
Automated user interface adjustment
  Randomly Featured Patents
Computerized system and method for optimizing after-tax proceeds involving options
Automatic bread slice-toasting oven
Aerosol-type, sprayable, water-in-liquid hydrocarbon multicolor paint and process for making
Napkin holder
Valve-operation control system for internal combustion engine
Transmission ratio control system for a continuously variable transmission
Wood planing machine
Azahydroxybenzotriazoles and derivatives thereof for peptide coupling reactions
Spectrometric gamma diagraphy system for the determination of the geological parameters of a rock
Apparatus and an associated method for facilitating communications in a radio communication system that provides for data communications at multiple data rates