Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Representing polarized light in computer models
Molded surface of a concrete product
Image forming apparatus and system connectable with an authorization apparatus via a communications network, the image forming apparatus comprising an apparatus control section, an initial inq
Caprazene as a novel compound and derivatives thereof, and caprazol as a novel compound and derivatives thereof
System and method for ranking content and applications through human assistance
Auto-provisioning of network services over an Ethernet access link
Transmitter and receiver for streaming media including packet padding
  Randomly Featured Patents
Ignition device for internal combustion engine
Eyelash comb
Apparatus and method for adjusting the color temperature of a television receiver
Method of playing a poker-type wagering game
Load holding valve
Substrate processing apparatus and method for manufacturing semiconductor device
Bottle breaking apparatus
Method of making an alkylated aromatic using acidic ionic liquid catalyst
Catalyst material for reducing the nitrogen oxides in flue gases
Power connector