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Class Information
Number: 434/206
Name: Education and demonstration > Mathematics > Arithmetic > Rotatable wheel-shaped element (e.g., ring, disc, cylinder, etc.) having indicia on perimeter thereof
Description: Subject matter including indicia such as numbers located on the circumference of a means having a circular cross section.

Patents under this class:

Patent Number Title Of Patent Date Issued
8317522 Hormonal quotient profile calculator Nov. 27, 2012
8042291 Scent releasing picture changer Oct. 25, 2011
7677895 Arithmetic measurement system Mar. 16, 2010
6872078 Teaching cylinder instrument Mar. 29, 2005
6729883 Numeric teaching device May. 4, 2004
6358059 Method and apparatus for teaching rapid decoding (reading) and encoding (spelling) Mar. 19, 2002
6142784 Mathematical learning game and method Nov. 7, 2000
5827067 Method and apparatus for educating mathematical functions Oct. 27, 1998
5791905 Workout scheduling device Aug. 11, 1998
5775015 Location recorder process and assembly Jul. 7, 1998
5640774 Diet aid device and method Jun. 24, 1997
5007840 Operations processor Apr. 16, 1991
4902230 Rotational educational apparatus Feb. 20, 1990
4865324 Magnetic wheel puzzle Sep. 12, 1989
4651992 Puzzle-type game Mar. 24, 1987
4368381 Numeral adding toy Jan. 11, 1983
4306368 Visual communications device for use by handicapped persons Dec. 22, 1981
4295832 Educational toy Oct. 20, 1981
4233757 Mathematics device Nov. 18, 1980
3995378 Mathematics visual teaching aid Dec. 7, 1976

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