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Class Information
Number: 434/195
Name: Education and demonstration > Mathematics > Arithmetic > Manually manipulated elements having size proportional to numeric value
Description: Subject matter including pieces handled by hand and sized according to their numeric value.










Sub-classes under this class:

Class Number Class Name Patents
434/196 Fraction representing elements 15


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8529266 Mathematical teaching apparatus and methods Sep. 10, 2013
8317522 Hormonal quotient profile calculator Nov. 27, 2012
8128407 Method and system for teaching math Mar. 6, 2012
7695283 Visual arithmetic teaching device Apr. 13, 2010
7104799 Mathematics teaching tool Sep. 12, 2006
7059861 Math manipulative educational learning game Jun. 13, 2006
6813841 Measuring device for teaching incremental measurements Nov. 9, 2004
6758675 Base ten primary teaching kit Jul. 6, 2004
6739875 Teach-aiding weight set May. 25, 2004
6666688 Liquid measurement teaching aid Dec. 23, 2003
6609712 Math manipulative educational learning game Aug. 26, 2003
6595778 Base ten primary teaching kit Jul. 22, 2003
6575756 Mathematical teaching apparatus Jun. 10, 2003
6575754 Device and method for teaching mathematical properties associated with even and odd numbers Jun. 10, 2003
6243959 Measuring and instructional ruler Jun. 12, 2001
6206701 Mathematical teaching apparatus and method Mar. 27, 2001
6196847 Educational mathematical apparatus Mar. 6, 2001
5980258 Mathematical teaching apparatus and method Nov. 9, 1999
5881469 Measuring and instructional ruler Mar. 16, 1999
5868577 Factor blocks kit and method of use Feb. 9, 1999
5820381 Teaching apparatus and method for visually representing mathematical expressions Oct. 13, 1998
5749734 Mathematical teaching apparatus May. 12, 1998
5683252 Multi-functional game and learning device Nov. 4, 1997
5679002 Fractional-arithmetic-teaching game and method for playing Oct. 21, 1997
5645431 Teaching apparatus and method for visually representing mathematical expressions Jul. 8, 1997
5599188 Didactic-educational toy for elementary arithmetic operations, reading and writing Feb. 4, 1997
5597308 Assembly including interlocking components for teaching mathematical concepts Jan. 28, 1997
5423682 Numbering system teaching aid Jun. 13, 1995
5421732 Apparatus and method for teaching addition and subtraction Jun. 6, 1995
5366378 Visual teaching aid Nov. 22, 1994
5297965 Mathematical and spatial toy apparatus Mar. 29, 1994
5238407 Blocks with mating bosses and recesses which bulge for interference fit Aug. 24, 1993
5137452 Base--ten blocks employing single, attachable blocks of one color row of ten blocks of different color Aug. 11, 1992
5120226 Toy and teaching aid combination Jun. 9, 1992
5098301 Multiplication facts learning aid Mar. 24, 1992
5076793 Fractal mathematics kit Dec. 31, 1991
4914019 Multi-purpose learning device Apr. 3, 1990
4838794 Metric block toy Jun. 13, 1989
4812123 Educational device and game Mar. 14, 1989
4804187 Game assembly based on the Phi factor Feb. 14, 1989
4772208 Apparatus for use in teaching mathematics Sep. 20, 1988
4585419 Didactic aid for the teaching of any number system Apr. 29, 1986
4571189 System for teaching coin relationships Feb. 18, 1986
4548585 Teaching aid for mathematics Oct. 22, 1985
4547160 Educational building toy Oct. 15, 1985
4518359 Multi-purpose instructing block May. 21, 1985
4518358 Educational toy and method May. 21, 1985
4504234 Aiding mathematical learning Mar. 12, 1985
4382794 Instructional aid May. 10, 1983
4354842 System for utilizing interactive blocks to teach arithmetic Oct. 19, 1982

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