


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:
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 
Multifunctional 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 
Baseten 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 twostage 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 


