


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.
Subclasses under this class:
Patents under this class:
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 
Teachaiding 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 
Multifunctional game and learning device 
Nov. 4, 1997 
5679002 
Fractionalarithmeticteaching game and method for playing 
Oct. 21, 1997 
5645431 
Teaching apparatus and method for visually representing mathematical expressions 
Jul. 8, 1997 
5599188 
Didacticeducational 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 
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 
5098301 
Multiplication facts learning aid 
Mar. 24, 1992 
5076793 
Fractal mathematics kit 
Dec. 31, 1991 
4914019 
Multipurpose 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 
Multipurpose 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 


