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Class Information
Number: 434/208
Name: Education and demonstration > Mathematics > Arithmetic > Ball, block, or disk
Description: Subject matter including a sphere, a generally cubical element, or a thin circular object.










Patents under this class:
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Patent Number Title Of Patent Date Issued
7097174 Method and device for playing a game using remainder values Aug. 29, 2006
6926530 Game apparatuses and methods for use in teaching the addition and subtraction of positive and negative numbers Aug. 9, 2005
6811402 Method of playing a mathematical game Nov. 2, 2004
6790118 Block set for educational purposes Sep. 14, 2004
6755658 Game apparatuses and methods for use in teaching the addition, subtraction, multiplication, and division of positive and negative numbers Jun. 29, 2004
6755655 Electronic educational toy appliance and a portable memory device therefor Jun. 29, 2004
6729881 Electronic educational toy appliance and a portable memory device therefor May. 4, 2004
6619661 Jigsaw puzzles for practicing arithmetic Sep. 16, 2003
6575755 Fraction circle Jun. 10, 2003
6575756 Mathematical teaching apparatus Jun. 10, 2003
6513708 Mathematics teaching system Feb. 4, 2003
6206701 Mathematical teaching apparatus and method Mar. 27, 2001
6116603 Apparatus and method of playing a math capturing and recapturing game Sep. 12, 2000
6065971 Finger ring counting device May. 23, 2000
6062944 Toy ball as teachware May. 16, 2000
5980258 Mathematical teaching apparatus and method Nov. 9, 1999
5967787 Educational display with a clock and with numeral and date blocks accompanied by a base 10 mathematical apparatus Oct. 19, 1999
5927718 Game apparatus Jul. 27, 1999
5868577 Factor blocks kit and method of use Feb. 9, 1999
5827067 Method and apparatus for educating mathematical functions Oct. 27, 1998
5823783 Rotating pie graph: mathematics learning tool Oct. 20, 1998
5749734 Mathematical teaching apparatus May. 12, 1998
5720615 Educational device for aiding in the projection of views of an object Feb. 24, 1998
5683252 Multi-functional game and learning device Nov. 4, 1997
5571019 Apparatus and method for teaching concepts of mathematics Nov. 5, 1996
5492325 Math game device Feb. 20, 1996
5447433 Learning system with interlocking hexagonal control structures Sep. 5, 1995
5385473 Display polyhedra having marked and unmarked paired opposing faces Jan. 31, 1995
5338203 Educational aid for mathematics Aug. 16, 1994
5297965 Mathematical and spatial toy apparatus Mar. 29, 1994
5281144 Math facts game apparatus Jan. 25, 1994
5238408 Row of joined arithmetic blocks with common walls which are double end wall thickness Aug. 24, 1993
5238407 Blocks with mating bosses and recesses which bulge for interference fit Aug. 24, 1993
5213506 Binary educational device May. 25, 1993
5176577 Rectangular blocks for teaching arithmetic have uniform size joinability and transparency Jan. 5, 1993
5176381 Mathematical game apparatus and method Jan. 5, 1993
5169317 Educational toy Dec. 8, 1992
5156548 Die having magic squares Oct. 20, 1992
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
5108291 Supplementary teaching instruments Apr. 28, 1992
5098301 Multiplication facts learning aid Mar. 24, 1992
4957443 Educational card game system Sep. 18, 1990
4900255 For two-stage Quincunx Feb. 13, 1990
4838794 Metric block toy Jun. 13, 1989
4713009 Teaching apparatus and method for solving algebraic linear equations Dec. 15, 1987
4645461 Method for structurally differentiating polynomial functions Feb. 24, 1987
4632661 Methods for structurally performing differential calculus Dec. 30, 1986
4560354 Device for teaching decimal math Dec. 24, 1985
4521197 Money calculation game Jun. 4, 1985

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