Resources Contact Us Home
Browse by Category: Main > Business
Class Information
Number: 434/193
Name: Education and demonstration > Mathematics > Arithmetic > Manually manipulated numeral shaped elements
Description: Subject matter including pieces handled by hand and having the form of a symbol which represents a number.

Patents under this class:

Patent Number Title Of Patent Date Issued
8210898 Pivotally manipulable toy Jul. 3, 2012
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
5957692 Teaching aid to be worn by an individual Sep. 28, 1999
5951299 Method for mathematical representation, manipulation and problem solving, and kit Sep. 14, 1999
5865627 Education system kit Feb. 2, 1999
5718589 Learning enhancing system, and method of teaching Feb. 17, 1998
5620324 Educational kit including separable alphanumeric symbols Apr. 15, 1997
5529497 Apparatus for teaching the addition and subtraction of whole numbers through the use of objects Jun. 25, 1996
5074794 Sequencing puzzle Dec. 24, 1991
4846692 Educational children's toy Jul. 11, 1989
4545768 Activity center Oct. 8, 1985
4430825 Educational toy using numerical figures to form a human head Feb. 14, 1984
4382794 Instructional aid May. 10, 1983
4240213 Educational amusement device for matching words with non-verbal symbols Dec. 23, 1980
4222181 Mobile educational toy Sep. 16, 1980
4168583 Number board apparatus Sep. 25, 1979
3934357 Teaching method and apparatus Jan. 27, 1976

  Recently Added Patents
Churn prediction and management system
Micro vein enhancer
UV liquid treatment system
Frothable aqueous composition for use in a carpet backing composition
Pear-shaped convertible reading glasses
Memory elements with increased write margin and soft error upset immunity
Imaging lens
  Randomly Featured Patents
Paintball guns having hopper, adapter and/or feed tube aiming/pointing device mounting assemblies
Variable resolution x-ray CT detector with target imaging capability
Bar code scanner
Distribution-type fuel injection pump
M-phenoxybenzyl and .alpha.-cyano-M-phenoxybenzyl esters of 2-haloalkyl (oxy-, thio-, sulfinyl-, or sulfonyl)phenylalkanoic acids
Dried blood factor composition comprising trehalose
Friction welding methods and apparatus
Row crop planter convertible between narrow and wide row spacing
Word processing system having small-sized and large-sized displays for simultaneous display and automatic power shut-off circuit
Identification and comparison of protein-protein interactions that occur in populations